Anti-Hero: Though Kotaro is a decent guy, he still brutally tears apart various Kaijin and other foes on screen.It’s only after he has an encounter with Aoi that he starts getting dragged back into the conflict, whether he wants it or not. Achilles in His Tent: After the falling out of Gorgom and his failed attempt of killing the Creation King, Kotaro has spent 50 years as a bitter loner, staying away from the fight for Kaijin equality and doing jobs in order to get medication for his injured leg.Age Lift: 19 years old in the original BLACK, 70 years old (present) and 20 years old (past) respectivly in Black Sun.Definitely a far cry from the original Kotaro. Adaptational Jerkass: One of his first scenes has him beating up a homeless man for money, followed by him accepting a job to assassinate a young girl, and also mocking a kidnapped young Shinichi in 1972.Portrayed By: Hidetoshi Nishijima (Present Day), Aoi Nakamura (Younger), and Ryusei Iwata (Child)