Jack Frost is just as most of the original stories would describe, a young boy with the ability to conjure up frost and manipulate the winter, with a spirit that embodies all that is wild and free. This particular boy awakens on a winter night, arising from the depths of cold, icy water, past thick, crackling sheets of ice in which his eyes struggle open from being frozen shut, letting out final visible breaths of white air. It is this night that Jack Frost, the unruly, troublesome winter spirit is born under the light of the full moon, which tells him his name—and only his name. It is on this night that he discovers the only things he will ever come to know for the next three hundred years—the power to create frost, the ability to ride the wind, and the nature of his invisibility, never being seen by any human being, instead being walked through as if he didn't exist at all. Cursed with this fate, being told nothing else by the moon, this is all that Jack takes and learns to make the most of for the next coming centuries.

Despite the circumstances, Jack attempts to conquer his disadvantages with the embodiment of fun, what he truly knows how to do best—his center, if you will. Ignoring things such as responsibilities or rules, he places all of his focus on the idea of making the most of any situation, even the most grave, and uses his abilities to bring out enjoyment, aiming for smiles and laughter. Using the power to create frost and snow, he takes greatest pleasure in producing snow days for children, tossing snow, loading the kids up with plenty of ammo for continuous wars of flying snowballs, and freezing roads to allow reckless sledding in the streets which always results in an undeniable joy being spread. Despite being unseen, Jack never hesitates in providing his support to produce a wide range of entertainment for young ones, even if at the end of the day, he fails to receive the credit for doing so.

It all stems from a past that he has no knowledge of, having lost all his memories of a past life when he awoke from the lake, in which he, as a boy of eighteen during the early eighteenth century, spent a majority of his time playing with his younger sister and other small children in his town. He was clearly the oldest of the crowd, yet Jack seemed to expend most of his energy in attempting to provide them with endless enjoyment ("Come on, Jack, you can't have fun all the time," spoken from his own mother, indicating that his ways were quite ritual). Climbing trees to play pranks, putting on silly shows with shadow puppets for entertainment, it's as though his purpose, even as a human, was for seeking out laughter and fun in people.

His vibrant nature isn't always appreciated by all, his Peter Pan complex stemming more towards being seen as "irresponsible" and "selfish", primarily indicated by Bunnymund's negative imagery towards the boy ("What's this clown know about bringing joy to children anyway?"). But as a boy frozen in his teen years, neglected by the moon, the only "parental figure" he's come to know, Jack responds as any boy his original age would, with a rebellious nature towards older, authority figures. There's immediate distrust and lack of interest, refusing to engage in anything that requires responsibilities and duty ("You're all hard work and deadlines, and I'm snowballs and fun times."), leading to constant defiance in order to stay true to what he truly believes to be important. He's no stranger to sarcasm either, preferring to engage in teasing banter to counter serious discussions.

But to say that Jack takes nothing serious in his life would be completely false as well. While he holds high records for his recklessness, he's proven time and time again of the strength in his protective nature over others, especially those smaller or more vulnerable than him. His troublesome nature creates hesitation within the Guardians into wondering about the degree that Jack actually cares for other people, but most often than not, he wouldn't abandon anyone if they are in need. Not only does he assist the other Guardians in their troubles against Pitch almost immediately, despite his own vocal unwillingness, but he demonstrates his instinctive care when he goes to various lengths to protect Baby Tooth, saving her from the grasps of the Nightmares and even sacrificing his staff, a very important item used to control his powers, to rescue her from Pitch.

These are actions that may heavily root from his time as a human, where he, as an older brother, made sure to care for his sister, using his talents of creating amusement as his primary technique for protectiveness. Even with the coming of endangerment, Jack will attempt to refrain from showcasing panic, continuing to seek out the fun to keep others from worrying, such as how he convinces his sister to play hopscotch over a frozen lake even as the ice begins to crack. The game saves her life, even if it results in his inevitable death. Three hundred years later, he continues his methods, realizing this strategy is the core that proves his qualifications as a Guardian, repeated with how he also protects Jamie against Pitch by distracting him with tossing snowballs and sledding across the town.

But even with his attempts to appear nonchalant and untroubled, Jack undoubtedly portrays extreme sensitivity over any cases of helplessness. It's heavily noted when Sandy is presumably dead and the winter spirit, rare tears building up in his eyes, mourns on his own, filled up with regret over not being able to stop Pitch before it was too late ("I just, I wish I could've done something."). It is a reminder of his believed uselessness, of three hundred years of standing to the side invisible to the world, never being able to do anything for anyone, remaining entirely alone. With still no words from the moon of his purpose, of why he exists, it is endlessly agonizing when his efforts either fail or turn the situation into something more dire, falling even further into misery when he fails at helping the Guardians restore Easter, causing them to lose their faith in him as well as destroying his own confidence to be capable of something more than what he is ("I make a mess of everything.").

All in all, Jack has a long time history of loneliness that powers his need to be accepted, despite making all attempts not to show it. Without so much as a companion or a friend, he often times speaks out loud to himself, or even engages in one-sided conversations with others, asking questions while making continuous efforts to become involved, with the hope that one day he could possibly be seen or heard and receive some sort of response. Having no knowledge of his previous life, having lost all of his memories from the time that he was human and how he saved his sister, Jack believes himself to have been born that night on the lake and constantly questions the Moon, the only one who's ever told him anything at all yet seemingly ignores him, with desperation on what he needs to do to get rid of that loneliness ("If there's something I'm doing wrong, can you, can you just tell me what it is? Because I've tried everything, and no one ever sees me."), often losing the hope that he ever cease to be invisible at all.

However, despite being unseen by humans, Jack has been capable of being seen by other spirits, notably the Guardians. Aware of this, like a rebellious teen who seeks attention, he's made his efforts to get noticed, even if, more often than not, it gets viewed as pure annoyance and peskiness. During his reunion with Bunnymund, the latter brings up, with agitation, the "Blizzard of '68", in which the winter spirit had shamelessly disrupted Easter. Yet, it can be noted that Jack looks upon the rabbit with excitement during this meeting, with a thrill in being able to speak with anyone, especially with the enjoyment he finds in exchanging teasing banter. It's also pointed out that he's made attempts to break into North's workshop in the past, even if he's never managed to "get past the yetis", a result of his curiosity and desires for company. Yet North was never even aware of Jack's attempts until he was told, revealing that not much attention was ever truly given to the boy even by the other spirits before he was chosen to be a Guardian.

It's inevitable for Jack to experience emotional hurt over being looked over and ignored, even more so when others constantly remind him of his flaws or remark about his fun-seeking attitude as something negative. But even so, Jack will continue to try to maintain that carefree, easygoing attitude against criticism, relying heavily on sarcasm and wit to counteract any actual pain he feels from the words ("Don't look at me, I'm invisible, remember?"). When Bunny comments on how it would be impossible for "that clown" to bring any joy to children, there's an obviously pained look from Jack that he immediately masks it with a smirk to pretend not to be affected by such opinions. However, the more he is pushed to the edge, the less he's able to suffice his containment with jokes, leaning more into letting out his frustrations in anger ("To spend eternity like you guys cooped up in some, some hideout thinking of, of new ways to bribe kids? No no, that's not for me.").

However, Jack never fully allows himself to break down when he's aching from his emotions. Whenever a situation begins to pick at his heart, breaking the barriers of a carefree exterior, he chooses to run away instead, retreating into the forest by himself when he first discovers he cannot be seen and flying out to the Antarctic when the Guardians begin to lose faith in him, he struggles on knowing how to approach his problems directly, facing constant issues of self doubt and lack of purpose. Instead of wallowing in self pity or depression for long, Jack attempts to avoid the sources of his problems by engaging in constant fun, playing with children or tossing snowballs to step away from reality, often times even momentarily forgetting the issues at hand (even after three hundred years, there's still surprise at being walked through).

Though he fights to avoid being honest about his feelings, Jack tends to still show his feelings through body language, with the crease of brows showing hurt or squinted eyes when angered, all visible even as he tries to conjure up a joke or retort to cover up his discomfort. Just as one may hide away when faced with sadness, Jack may pull up his hood to somehow try distancing himself from the issues that pain him. At the same time, excessive excitement is also something he fails to contain, although he makes no effort to hide these emotions, bouncing on the balls of his feet when making a new thrilling discovering or literally bouncing on walls when feeling joyous.

Much of his uncontrollable reactions come from lack of experience of dealing with others. From the moment that he is reborn on the night at the lake to meeting with all of the Guardians, Jack has very minimal interaction with anyone else, having few meetings with other spirits and never being able to engage in actual dialogue with humans. He does indeed get wiser over the course of time, paying very close attention to people's mannerisms, the formats in which they speak, and the like, but it becomes difficult to master anything without practice, leaving Jack on a continuous learning path in developing relationships with others. This primarily includes the use of physical contact, in which being invisible also contains the side effect of being completely walked through, preventing Jack from getting close at all to others since an attempt at touch would only be another reminder that he isn't believed in. Even when meeting with the Guardians, Jack keeps to his personal space, often times leaning away whenever either of them get too close, until he gradually becomes more accustomed to the casual touches. His first touch from a human, an unexpected hug from Jamie, prompts a wide range of shock from the embrace, along with a large sense of relief at the simple notion of being able to touch, proof that he's real and believed in.

And it is that fulfillment of interaction that Jack truly seeks and relishes in, true enjoyment coming from running or flying with others, playing with the snow, and being consumed with laughter. It is why he boils in anger when he discovers the Moon wishes for him to become a Guardian, despising that he's meant to join others in "bribing children" with material things like toys, eggs, and money, instead preferring the true joy to stem from natural play. When confronted with an actual child in front of their eyes, none of the Guardians seem to know how to distract her ("We are very busy bringing joy to children! We don't have time ... for children."), except for Jack who has spent so much time being surrounded by them, his own childlike innocence of seeking attention and joy proving the closest to understanding their needs.

"Darkness. That's the first thing I remember. It was dark, and it was cold. And I was scared. But then ... then I saw the moon. It was so big and it was so bright, and it seemed to chase the darkness away. And when it did ... I wasn't scared anymore."

Jack may have a strong dislike, and even fear, towards the darkness. It is the very first memory of his life, a time when he had no recollection of his past and all he knew was black in which he was entirely alone and so unaware. He recounts being scared and it is highly likely that that fear never truly left him, because despite his attempts to stand up to Pitch, his defenses break down further when engulfed in the darkness, an immense amount of fear building up when encountering Pitch in his sanctum, higher than in any other occasion in the film. Even during their time in the Antarctic, Jack can notably be seen building up sympathy for Pitch's loneliness until he realizes that everything would in fact be "pitch black", covering the world with fear, the moment in which he immediately refuses the offer to join his enemy.

There is also greater loneliness during the night time, when the children are off to bed and he wanders on his own, with no one to entertain with his frost and magic. Looking upon the moon, at its brightest, it gives him too much time with his own thoughts, frustrated at what he needs to do to be seen. Yet when Sandy brings forth his dream sand through the sky, the bright glow of it seems to bring a sudden cheer towards his mood ("Right on time, Sandman."), which may support the idea that it chases away his sorrows in the darkness of the night.

While he doesn't truly fear it like the darkness, Jack may not in fact embrace the cold either. Being consumed by it, it has become all that he knows, all that he feels, yet it is the very thing that keeps him away from reaching for what he desires—human connection. As the winter spirit, he is prevented from being seen, from touching another, a curse that he didn't ask for without even knowing why he was created this way. Sometimes, he looks upon his own frost with spite, a reminder that it is the barrier that keeps away from others ("Sorry. All I can do is keep you cold.").

"You are the Spirit of Winter, boy, because you will come to know its joys ... and its horrors ... and bear them better than any other soul that was or will be born." — BLACK SHUCK

jack arrives at the caer scima castle at the beginning of the month, still a young spirit, having only been awake for 15 years, shocked and excited to not be invisible and to be seen by everybody he comes across. the first person he befriends is hiccup, who after some days finally warms up to him allowing them to start confiding in one another. realizing everyone seems very concerned with the war in this world, jack appears on the network trying to convince people to just enjoy their time, offering to even provide them with some snow. it's there that he first meets many new people including jon, who informs him they've met before, making jack realize he's been in this world before despite not remembering.

after taking part in the quest involving the moon where he tried and failed to talk to it, jack arrives back at the castle where hiccup asks him if he'd leave with him and merida, traveling to take up residence at the station. despite not having had the greatest first conversation over the network, he and merida slowly become closer friends, leading the three to eventually get involved in an incident where a microwave accidentally blows up. alice helps to clean up, offering to cook for them, which eventually leads to jack beginning to really enjoy her company.

the end of the month brings about samhain, where he gets involved in a ridiculous night of playing party games with a group consisting of hiccup, merida, jon, and new friends, korra and mako. jack gets a surprising kiss from the fire-bending mako and finds a close friend in korra who seems to understand his feelings more than anyone thus far. during samhain events, jack meets with the black shuck who plays with his fears and informs him that he's in fact dead and was originally a human named jackson overland frost.

event / despite the unseelie trying to defend and capture the moon, having been created by it, jack actually seeks to talk to it, seeking it out with ariadne before the moon manages to escape and he loses his chance.

boon / jack receives a leather necklace with an bronze amulet attached that turns gold when he puts it on, allowing him to transform into a human whenever he wishes.

"I guess you've always seemed ... complete to me, even without it. Like this is who you were born to be, making people happy. If the myth of Jokul Frosti was around way before you, it was obviously just a prophecy waiting for the perfect guy to be born and inherit it." — HICCUP

at the beginning of the month, jack receives a message from korra announcing she'd be off on a trip for a while. deciding to pay her a surprise visit, he goes on a week long journey of traveling across the map where he meets alice out on the field, visits jon at cothromach despite it being in the midst of a battle, and goes up to the barrel where he reunites with hiccup and toothless before heading out on a flight together. originally afraid to join the quest of burying bones, afraid of the idea of death, he finally goes out to do so with merida the next day before he suddenly begins to feel drowsy, falling into a sleep.

he's only asleep for a week in the drabwurld, but in his own world, he experiences 285 years of invisibility again before he ever hast the chance to come back. just before he does, he meets with the guardians, helping them to stop pitch from covering the world in his darkness, being believed in by jamie, and eventually becoming a guardian himself. soon enough, he falls back asleep, waking up in his room in the station. shocked to be back for the first time in centuries, it takes time for him to ease back into the rhythm of things, but he learns that hiccup and merida had watched over him, staying by his side the entire time he was asleep, relieved to be back with his friends here.

he spends days of fighting the fearsome wild dogs, where he also meets muscovy, who has a friend called the general, another spirit of winter and the first being he meets in this world who's quite similar to him. when the fighting of the dogs eventually ends, jack hears from waver about alice and a group of people stranded out on a ship. joining hiccup and several others, he flies out to rescue them and bring them back to land.

event / jack uses his ice magic to fight off the dogs that aim to attack anyone in the drabwurld, helping some such as kieren, who can't fight them on their own. eventually, the dogs get the best of him, forcing him into an illusion of darkness where he hears pitch's voice haunting him that he will forever be alone. however, he's emotionally stronger to overcome the words, defeating the dogs with success.

boon / jack receives a pair of jingly, blue spirit shoes, similar to the ones that the elves from north's workshop had tried to give him.

"Working title is: 'JACK FROST frosty bad boy or secret snow angel?'. New working title: 'JACK FROST the little shit from beyond the grave'." — KIEREN

the month begins with jack and hiccup going back to caer scima temporarily to see the newcomers that have arrived in the world. along with meeting several new unseelie folk including shijima and junpei, jack also gets a mistletoe kiss from hiccup.

with most of his excitement this month being about the holiday season, jack uses the network in an attempt to help people learn about different christmas traditions (which results in publicly bickering with hiccup in the background). he also spends a lot of the month traveling around the world to keep busy with his snow, helping yukari while she's lost (and showing her he's capable of making ten snowmen at a time), assisting a naked jon out in the forest, and teaching arya about santa claus.

being asked by waver to help with the holiday party at the barrel, jack decorates it with plenty of snow and create an ice rink on the side. there, he convinces hiccup to skate with him, makes ice patterns with elsa, has snow fights with waver, accidentally flirts with lancer, and gets kissed under the mistletoe by saber. he also gets scolded for finally making it snow in rin's room.

when christmas comes, jack visits many of his friends either leaving sparkling snowfalls in their room or ice sculptures. as his most precious friend, hiccup receives a handmade bracelet made from old suede from jack's own clothes. when he gets back to the station, he's touched when he finds plenty of presents left for him too, never having been given gifts before because he had been invisible for so long.

as the year nears its end, merida contacts jack via locket warning him to stay away from caer scima, having been told that danger might arise there soon. he promises to stay out of trouble, but chances are, he'll end up doing the exact opposite.

boon / because he prefers not to hunt, jack doesn't partake in the event this month and thus receives no boon.

"We have responsibilities greater than ourselves. I know you know that, and I will dare to allow myself the hope that maybe you will find a way better than war." — SABER

knowing that the war is coming, jack decides that this time, he'll do all he can to prevent it from happening. for one, people need to be protected, he decides and contacts elsa to help him make thick ice barriers around homes and villages for minor defense, including ariadne's manor. afterwards, he goes to meet general saber, taking his first step into working with authority, to lay out plans of where he can cause snowstorms to slow down the seelie troops from arriving. the discussion makes him realize the thoughts on war from a soldier's point of view and despite having opposiing opinions, gains a lot of respect for saber.

meeting with waver, he realizes innocent natives are going to be in the midst of the war path and agrees to help guide these locals to safety over in redgate. while there, he finds korra, learning about her temporary imprisonment, waiting for trial to deal with the events that happened months prior.

jack eventually learns that merida has undergone a deep sleep, the same as he, and with Hiccup, visits her often, aware that she should wake up after a week. she does, as he suspects, except this time, she's several years older, but all in all, the same, leaving jack in relief. at the same time, jack appears on the network, offering to aid anyone in the midst of war on either side, which earns him a threat from the seelie soldier, tarz.

the rest of the month is spent causing trouble with his snow, all about the map. however, he also does learn that alice has "been courted", which he congratulates her for, though it does make jack realize that everyone around him seems to be finding love in the midst of all of this.

quest / waver asks jack if he can help guide some of the local natives to safety in redgate. accepting the quest, jack guides them across the map using the wind and his ice to speed them through the roads on the wagons. during stops, jack plays with the children and tells the adults tales of his home world. upon reaching redgate, the natives show appreciation for his help and he realizes how much he really vows doing his best as a guardian to protect the people.

boon / because of his frustrations over the war, jack doesn't ask for a boon this month.

"See, I told you I had something pretty for you, Nemexia. And it's not something that's going to disappear or fade. It only makes things better." — JACK to JABBERWOCK

the start of the month brings about the start of the chaos of war, including the escape of the wild jabberwock causing destruction everywhere. with the destruction of caer scima, jack gets contacted by clarke who asks him to help ease the fires that grow in la llorona where jack rushes to fast, assisting billy in trying to put them out.

it isn't long before merida contacts jack, telling him to find waver to help find a solution to this. jack does so, and together they manage to concoct lavender snow, which can then be used as "catnip" to calm down the jabberwock. when jack goes to the station to hunt it down, he finds alice, in a disarray of shock, believing herself to be the cause for the jabberwock's appearance. taking her to safety, jack tries to ease her worries, reminding her that she can create such beautiful and magical things and that he exists because her beliefs, including those in him, are that strong.

jack finally gets to meet the jabberwock and is surprised to learn that it's merely a child. realizing that this is something he's sworn to protect in his vows as a guardian, jack takes care in approaching her, trying to comfort her as he learns that she has a name: nemexia. touched by the sight of this child who doesn't know any better, he relieves her worries for a snowfall, mixed with the scent and aura of lavender which brings her relief and joy as she bounces around to play in it, like an innocent child on the morning of a plentiful snow day.

however, soon enough the jabberwock is killed, leaving jack in a tremendous shock. he also learns that hiccup has left the drabwurld. the loss of a child he was meant to protect and the loss of his best friend cause jack to shut his feelings in, secluding himself from others for some time.

event / jack and waver work together to find a way to calm down the jabberwock and work together to create an unique "lavender snow". this snow is then used out in the station, where jack causes it fall down from a snow cloud, showering down over the jabberwock which then calms it down.

boon / jack recieves a rabbit companion, which he names "aster". it only appears at night and cannot be communicated with vocally, but it assists jack in leading him to children that are in danger while guiding him in his travels.