کایییچی واکاوجی

Mitsuki's doctor. A kind, caring and easily flustered man. He takes on a role close to a second father for Mitsuki.

[Spoiler: It is revealed later in the series that he is a former band member of "Route::L". At the start of the series he has given up music, but he later returns to the music business in order to find the missing Mitsuki, and becomes Fullmoon's producer.]

[Spoiler: In the manga, he falls in love with Ms. Oshige, and the two are married by the end of the series.]