He was originally a student of Masamichi Yaga's alongside Satoru Gojo and Shoko Ieiri at Tokyo Jujutsu High. As a student, Suguru and Satoru were both considered "the strongest". Suguru was capable of making short work of experienced curse users on multiple occasions with little effort. His collection of cursed spirits was wide with a high variety of different abilities and roles in battle. Suguru was not overly dependent on his curses and was a highly capable close-quarters fighter.