川瀬

"Dirty people like you exist, so I turned out the way I am."

Born in Aizu. Tamamori and Minakami's childhood friend. While he has such a pretty face as to get himself bona-fide groupies, his unpleasant sarcasm is the fly in the ointment.

Lives alone in the Ikeda House, a western mansion located in Hongou District Area 3. A genius student in the Imperial University's medical department.

It's his daily routine to make fun of Tamamori, going to hang around the Umebachidou whenever he has even a little spare time. He actually has no appreciation for the arts or antiques and finds Jinbocho to be a dusty, dinky town, which he detests. Clean freak.

Despite his personality problems, Tamamori and Minakami think he's a good person at heart... as he enjoys Minakami's suicide and finds it entertaining, however, there's something off about him as a human being. His darknesses are deep.

His full name is Segawa Eiichi, later changed to Ikeda Eiichi after being adopted by the Ikeda family.