Mitsuki Mashiba (twin sister)
Youhei Mashiba is a member of Kyoko's old gang, his first appearance is in episode in episode 6 of season 2 "Hired,Fired,Tired" where he fills in for Taneshima and Sato. He occasionally gets called in to help at the restaurant when staff are low. Yōhei is unemployed, a status which he does not change in order to ensure he is always available should Kyōko need his help. When he remarks that Kozue is pretty (shortly after she is dumped by her latest boyfriend), she develops a persistent interest in him because he rejects her on the grounds of not being able to provide for her given his unemployment rather than because he dislikes her. He does not get along with his twin sister, Mitsuki. It is implied by the end of the series that Youhei and Kozue are sleeping together.
He is distinguished by his green jumpsuit, ponytail, and snaggle-tooth.