They initially meet on Takeru's second day at Tenbi, when both of them pretend to be sick and go to spy on the girls at their physical exam.
He has open feelings for Himegami and is supposedly in her fan club. He often like Takeru peeks on girls when they are in the shower, changing, etc. Much like Takeru, Kengo has a strong sense of justice. He sets Takeru straight, after seeing Inaho cry, figuring out what caused it. He calls Takeru a hypocrite for claiming to want to protect girls, yet making Inaho cry.
Point Man - Kengo has an internal type maken. His maken "Point Man" allows him to switch the places of an object he touches with that of another.