Age: 14

Class: Year 5, Class Ro

Committee: Library Committee

An upperclassman with a gentle and helpful personality that Rantarou and the other younger students adore. He's also a worrywart and his big weakness is his indecisive nature, which shows up any time he has to make a decision.

Usually seen in a pair with his friend Hachiya Saburou, who likes to use Raizou's face as a disguise, making the two look identical most the time. In the original work Raizou’s hair is black; however, in the anime it is a bright brown. His name is taken from the proverb "付和雷同 (following blindly)".