壬生 心乃助

"Don't call out to me so casually! The only one who can use that name is my big brother!" 1st year high school student. Star Sign: Saggitarius Soutarou's younger brother. An underclassman at Lapis's school. His older brother calls him 'Koko', but if anybody else calls him that he gets ragingly angry. A real brocon, he's always making sure Soutarou doesn't have any undesirable girlfriends. He has a cute face, but he talks rough.