He was a former member of the Zenin family and an infamous assassin known as the "Mage Killer", having signed a contract with the Time Vessel Association while still not a curse master. He was also the father of Megumi Fushiguro and a former enemy of Satoru Gojo. Toji is a cold, calm, confident person who likes to have fun and earn money using his skills. He likes insightful conversations with others, if they relate to himself in one way or another, and can exchange witty banter.