Kuro Sakuragawa

 As a young child and a teenager, he was raised in a traditional Japanese home with his numerous relatives. One day while eating with the other members of his family, the rest of his siblings, and possibly cousins are seen to fall over and die within seconds of eating. His grandmother revealed that the food he was given was Ningyo as well as Kudan meats as part of the Sakuragawa family's aim to make someone who could accurately predict the future. To test if the meat actually worked, his mother was able to subject him to numerous experiments which involved cutting him open to the point he either felt no pain or didn't affect him. Together with his cousin Rikka, he was the only one to survive. He has a normal high school life as he meets a girl in Saki Yumihara and eventually going to the same school. At this point He also sees Rikka in the hospital she admitted herself to, going regularly enough to ensure that nurses are aware of the man, and Saki visits him with her to ensure that they aren't flinging his. He was a second-year at H-university as well as studying at their law school. Eventually, Saki finds out the truth about him when they come across the kappa during a visit to a shrine and the kappa runs away in terror. The incident prompts her to cut the ice with him and move away to a different city to work immediately after graduation.