First Manga Appearance: Chapter 75
Name Meaning: Minami=south, Youkou=important points; principle; sunshine
Occupation: Teaching staff at Tsujido High School; homeroom teacher of class 1-F
Previous Occupations: Teaching staff at Yushin Institute Elementary School (Tokyo)
Special Skills: Killer Bear Chop
Secrets: Has a Lolita complex
Notable Features: Homeroom teacher of class 1-F; the Kanto Area Karate Bout Champion; fifth dan in karate
A brutish, Yakuza-like teacher with massive strength & incomparable fighting ability. He worked at Yushin Institute Elementary School in Tokyo. He has a secret Lolita complex & was fired from his job after playing doctor with a small girl, Miyo (not her real name). He enjoys watching child pornography in his spare time.
He transferred to Tsujido High soon after & was assigned homeroom for the delinquent class 1-F, replacing Murakoshi Ayumi. His job was to reform the delinquents using any means necessary. On the 1st day of term, he puts the delinquents in line by beating up late arrivals & inspecting bags. Only Ryuji rebels against his methods & he punishes the whole class by making them swim in the cold pool, only stopping if they change their hair & clothes, conforming to the school dress code.
That night, he gets attacked by an angry group of masks students & easily takes them all down, showing off his karate skills. The next day, every student complies to the school dress code, except for Ryuji. After he taunts Ryuji about his relationship with Ayumi, he gets challenged to a one-on-one duel against Ryuji & gladly accepts, scheduling it for the following Saturday in the school gym.
On the day of the fight, he shows off his massive strength to the crowd through dumbbells & pummelling stone pillars. In the locker room, he gets approached by Eikichi, Saejima & Abe, who reveal that they went to Yushin Institute & discovered his secret. He doesn't believe them until they bring Miyo (not her real name) in & he throws the fight. From this point onwards, he does the Oni-baku's bidding & beats down any 1st years in 1-F that clash with the Oni-baku.
During the Midnight Angel arc, he hears of the Oni-baku's fight with the Kamakura Massacre Unit. Seizing the opportunity to take revenge on the Oni-baku, he dresses up as a Kamakura Massacre Unit member & tries to attack Eikichi, without success. He accidentally attacks the principal instead & flees. He later gets interrupted by Miyo (not her real name) while trying to attack Eikichi on the street & Miyo's mother calls the police for kidnap. Minamino is last seen holding Miyo hostage & surrounded by the police. He eventually escapes.
He still works as a teacher at Tsujido & is later seen getting provoked by the large giant, Kiwamezawa. When Saejima partners up with Kiwamezawa to finally take down the Oni-baku, the Oni-baku summons him to fight Kiwamezawa for them. The fight goes out of control, with him accidentally hitting the principal again & the police arrive to stop the fight. He is pursued by the police & is dubbed by the media the "Rampaging Teacher".