Frenzy

Joanna Cargill was born to an abusive soldier father who favored his son and always lashed out at her for any reason. When the news of her brother's death reached her father, he lashed out at her more than ever and her powers activated. Without knowing it, she tried to defend herself by punching him, only for her fist to go straight through his chest, killing him. Joanna was afraid of what she was and what she had done, so she ran away.

Joanna Cargill started off as a mercenary known as "Frenzy". During one mission, Frenzy came head-to-head with the mutant Gambit, and she developed a love-hate relationship with him.

Frenzy was eventually welcomed to the new mutant island of Krakoa, created by Xavier, Magneto, and Moira X. She entered through the teleportation gateway alongside other villainous and fractious mutants, who had been invited to join the nation in order to heal mutantdom and start over as a whole species together.

She helped along with the plans to create a mutant space program with Abigail Brand, relaunching S.W.O.R.D. in the process.