Jack silently watched as the young woman rocked her newborn son in her arms, unknown to either of them that this baby is special and, will at the age of ten, will be Jack Frost's first believer as well as help to defeat Pitch Black alongside the Guardians and his friends, though Jack felt some kind of connection, a bond, with the baby.
For the first three years of the child's life he is able to see and interact with Jack but loses that ability at age four forgetting about the Spirit of Winter as he is taught to believe in Santa Clause, The Sandman, The Tooth Fairy and The Easter Bunny leaving Jack alone once again to wonder the world with the wind as his only friend.
Even though the boy, who Jack learned is named Jamie, forgot about him he continued to watch over the boy, playing with him whenever he brought Burgess snow days during the winter months for Jamie and the friends he makes as he grows older, always hoping that Jamie will one day see him once more.
"Hang on Jamie I got you." Jack said as he formed ice under the now ten year old boy's sled, guiding it through town making sure Jamie was kept safe from harm at least until the couch hit him knocking out a tooth, three days before Easter.
"Cool a tooth." Jamie exclaimed as he came out from behind the couch and joined his friends, none of them hearing Jack as he tried to get their attention even when he landed right in front of them. "What's a guy got to do to get a little attention around here?" Jack asked but Jamie walked right through him as if he wasn't even there, which hurt Jack and the immortal teen sighed before flying off.
For the next three days Jack spends time with the Guardians of Childhood, after learning that he was chosen by the Man in the Moon to become one of them and at first refused to accept his fate but after finally regaining some of his memories realized that he is, indeed, a Guardian.
With that knowledge and Baby Tooth he made his way back to Pitch's lair where he notices all but one light flicker and go out on the globe. "Jamie." He smiled once he realized who the last light was. Landing on the sill outside Jamie's bedroom window Jack listened to him as he pleaded with the Easter Bunny, holding his stuff rabbit in his hands, to give him some sort of sign to help him keep on believing but when nothing happens Jamie begins to lose hope, thinking that it really was all a dream and nothing more.
Not wanting Jamie to give up on the Guardians Jack quietly pushed open the window to the boy's room and stepped inside while thinking of a way to get Jamie hoping again. When the idea came to him Jack turned and lightly covered the glass with frost before he first drew an Easter egg then above it drew a rabbit and, wanting to try something new, focused his power on the rabbit making it come to life and hop around the room.
Jamie laughed as he tried to touch it before the rabbit burst into snow which fell around Jamie, one small flake landing on his nose making Jamie think about what his mom told him three days earlier, "Hat Jamie you don't want Jack Frost nipping at your nose." After wards he asked who Jack Frost was and his mom told him it was just an expression.
At the time he had believed her but no, with it snowing in his room and the frost appearing on the inside of his window that someone he couldn't see drew on made him question what his mom told him as he uttered the name, "Jack Frost." Hearing an unknown voice in his room caused Jamie to blink and search his room for the voice, once more saying Jack's name.
Jamie turned and when he did he spoke Jack's name for a third time upon seeing the white haired boy in front of him, his jaw hanging open and his eyes wide as all he can do is stare in amazement while the spirit comes to realize that Jamie is staring right at him instead of through him like he is used to.
"Wait, can you hear me?" Jack asked his brows creasing and his eyes narrowed, all Jamie can do is nod. "Can… can you see me?" Jack asked moving inches away from Jamie, who once more nods as a smile spreads on his face.
"And that is how your Uncle Jack gained his first believer, who is also your Uncle Jamie." Bunny finished telling his four year old kits before ending them off to find their mother so he could finish painting eggs, smiling proudly at them as they hopped off chatting about the story they just heard about how Jamie became Jack's first believer.