He is a third year student in charge of general affairs of the student council in the Sket Dance franchise.
Not much is known about his origin.
Shinba Michiru, who is created by Kenta Shinohara, has no information regarding any inspiration used to create him. He first appears in Sket Dance volume and episode 3. His Japanese voice actor is Kenji Nojima.
Shinba first appeared alongside the rest of the student council when they busted the Spider Society. He is an undercover agent who was posing as one of their members.
He faces Hime in the cook off. He takes his sweet time to pose for his fans who are taking pictures for him while Hime is cooking. Halfway through the clock, Shinba cooks an omelet. When the judges taste Hime and Shinba's food, they pick Shinba for the winner. Shinba explains to Hime that a warm food taste better which is why he took his time to wait.
Sket Dance (OVA)
Sket Dance OVA covers the story arc in the manga, The Sister Who is Worried About Her Brother Who is Worried About His Sister Worries ...