CG-Silver said:

Don't know about the guy singing the ending song though.

_Flan_ said:

There are some female characters on the anime manga's official website: There are some female characters on themanga's official website: http://tanaka.tank.jp/chara.html

He's been voicing lots of characters (more of a seiyuu). He has sung several songs without tie-up, so Servamp ED will be his first tie-up song (and he voices the main character).Fixed it. "Anime" site still only have male characters. The link you linked is "main" Servamp / manga site. (Just FYI, so that others won't get confused)