Sensei is the main protagonist and player character in the mobile game and anime series Blue Archive. As the teacher and advisor to the students of the Federal Investigation Club, Sensei guides the students through various missions and challenges in Kivotos, a city populated by academies. Despite being addressed simply as 'Sensei,' the character's real name is never revealed, making them a mysterious figure. Sensei is central to the story, acting as a mentor, leader, and strategist for the students.