Sensei is the main protagonist of Blue Archive who serves as the advisor of SCHALE.

Sensei is a teacher called by the President of the General Student Council to save Kivotos from the initial criminal uprising. From there, supported by Arona and the students of various academies, Sensei watches over Kivotos, solving problems, protecting the people, and getting into all sorts of (mis)adventures and wacky antics all the while.