Jack was one of the humans to climb up the Beanstalk and declare war against the Giants. Using her poisoned sword, Jack manages to kill many giants before one of the dying giants grabs Jack and skewers her with her own poisoned blade. Jack dies, but the battle at the Beanstalk becomes legendary throughout the Enchanted Forest. However due to her nickname, everyone believes that Jack was a man and that "he" was a hero.
Whilst up in the Beanstalk, Captain Hook and Emma Swan eventually come across Jack's skeleton. Emma picks up Jack's poisoned sword and uses it to protect herself from the last remaining giant, Anton, when he attacks.
- None known (family)
- She is based on the hero Jack from Jack the Giant-Killer and Jack and the Beanstalk.
- She had her name engraved in her poisoned sword.
- Jack was most likely believed to be a man due to her nickname.
- S2, E06: "Tallahassee" (corpse)
- S2, E13: "Tiny" (flashback)