Kagetora Tendou

He is initially part of a Yakuza syndicate and is also in possession of a license to teach which is why he is hired by his boss in order to infiltrate as a professor in the Kissho Institute and eliminate Onizuka for the disrespect he committed against the perverted producer who had his actress stolen by the latter and the Goblin Pro. It turns out that he has a past as a thug also in Shonan and has towards the professor an inferiority complex as well as a real sexual fetishism. He is recognized by Saejima who tells Eikichi that they attended the same school in middle school and that he was a failed basketball prospect. After several attempts to discredit Onizuka he will be saved by Onizuka himself bringing him back on the right track.