Jack Frost is
Jackson Overland Frost is Jack's birth name
Adventurous he would do nearly anything to have a good old adventure, but so would most people
Cares about his first believer Jamie like an older brother
Kangaroo, the Easter Kangaroo is a name Jack invented for his fellow Guardian Bunnymund
Forgotten and not believed in for most of his immortal life
Really really loves snowball fights, he does often start them
Other Guardians are his family now that his is dead, no matter how much he fights with Bunny
Saved his little sister from drowning at the cost of his life, he would do it again if he had to
The top of the naughty list or as North says to Jack "Naughty list. Ha. You hold the record".