Jack Kato

"The name's Kato, by the way."

- Jack Kato killing some Rune Knights. "A dangerous liability untamed, yet a vital asset in war."

- The Ashbringer

Jack Kato (ジャック加藤 Jakku Katō) is a former member of the Special War Unit, and an anarchy-crazed criminal who was captured by the Magic Council in an attempt to confine him for his past crimes. He is the mastermind of many bombings in Fiore, earning him the moniker Crazy Kato (クレイジー加藤 Kureijī Katō). At some point prior to his eventual arrest, he imbedded a pain-sensitive bomb into his heart in preparation for the "Grand Festival".

He serves as a major antagonist and one of the tertiary antagonists in the fanon spin-off, Fairy Tail: Into Darkness written by ZeAshbringer.

Trivia

 * His appearance is based off Gohan from the Dragon Ball Z series.