My name is Jack Frost, and I'm a guardian. How do I know that? Because the moon told me. And if the moon tells you something, believe it!
—Jack to the audiencesrc
Jackson Overland Frost, better known as Jack Frost, formerly known as Nightlight, is a character in Once Upon a Time, voiced by Chris Pine
Jack Frost is based on the legendary figure of the same name from folklore, and the character of the same name from the Guardians of Childhood and DreamWorks' film, Rise of the Guardians. He also alludes to the god Jokul Frosti from Norse Mythology
Jack is born a mortal boy, having a mother and a younger sister named Flee, who he grows very close with. One day, Jack and Flee go ice skating at the local pond, where Jack saves her life by pushing her out of the way. He tragically dies, but is resurrected by the Man in the Moon, changing his brown hair white and his eyes blue, where Jack is reborn as Jack Frost. but his memories are erased of his previous life.
Before Second Curse
One day, Jack loses faith in himself. However, Jack's memories are restored when he touches his tooth box that contained his memories before he was Jack Frost and his faith restored after Baby Tooth shows him how to use the Tooth box
After Fifth Curse
After the final battle between Emma and Gideon and their defeating of the Nightmare King, Jack and Tooth have a daughter, naming her Hope
Ice Magic - Ability to create and control ice and snow.
Age Manipulation - Ability to control one's age/or appearance