Also known as: 槻司鳶丸
Supporting character in Mahou Tsukai No Yoru. He is the vice-president of Private Misaki High School and Aozaki Aoko's classmate, and later becomes Shizuki Soujuurou's best friend.
He appears in Fate/Grand Order's Kumano Onsen Satsujin Jiken event as a detective, with Soujuurou as his assistant.