Keiichi Tamaru (多丸圭一)
Gender Male
Occupation The 'Agency' member, Esper
Voiced by Kazuhiko Inoue (JP), Dave Wittenberg (EN)

Keiichi Tamaru (多丸圭一) is a character in the Haruhi Suzumiya franchise.


Keiichi is part of The 'Agency' and made his debut in Remote Island Syndrome Part 1 as a distant relative of Itsuki. He is a rich man and owns his own villa in an isolate island.

He is seemingly murdered by his brother Yutaka Tamaru, but this turns out to only be a ploy to entertain Haruhi. Keiichi reappears in "Where Did the Cat Go?", in which he acts out another murder (although Haruhi is perfectly aware that it is fake).

Keiichi's final appearance occurs in The Intrigues of Haruhi Suzumiya, in which he acts as a police officer in order to rescue Mikuru from Fujiwara and Kyouko Tachibana.