Kosuke Sawaki

About

He is Asagi's adopted son and brother of her former boyfriend. A newby Taimanin mostly focus on investigation missions, that has not awoken to his Taima Art at the beginning.
Kosuke has a strong desire to prove his abilities and become stronger but is frustrated that he still lacks behind, in combat he fights very tactical but lacks quick intuition.

(Source: Taimanin Wiki)