Toji Fushiguro

He was a former member of the Zenin clan and the infamous assassin known as the Sorcerer Killer (術じゅつ師し殺ごろし, Jutsushi Goroshi?), contracted by the Time Vessel Association among other groups throughout his time as a non-curse user. He was also the father of Megumi Fushiguro and former enemy of Satoru Gojo. While working for the Star Religious Group, Toji serves as the primary antagonist of the Gojo's Past Arc.