Jack Frost's relationships

Jack Frost's relationships with other characters

Sister
Jack was extremely close to his younger sister, with them often playing together, such as skating and telling stories to one another. When they went ice skating, Jack calmed her down. Before she fell through the ice, Jack was able to save his sister, thus resulting in him being a guardian and why Manny chose Jack to be the next Guardian of Childhood.

When he remembered his sister, Jack was excited to know he had a sister and a mother before his times as Jack Frost.

Mother
Though he was only seen with his mother once, Jack was happy to learn he had a family, especially a mother similar to Mrs. Bennett. Jack's mom told her son and daughter to be careful when ice skating, with Jack promising they would be. This shows that Jack's mother did trust him enough not to get his sister hurt.

Tooth
Teammate and love interest

Baby Tooth
Friend.

Jamie Bennet
Best friend and first believer

North
Friends, Teammate and father figure

Bunnymund
Former rival turned friend and Teammate

Sandy
Friend and Teammate

Pitch Black
Enemy, attempted killer