Harimoto wears long robes and a straw hat. He has deep wrinkles, suggesting that he may be an older character introduced so far. Unlike Akiyama and Yokoya, who excel at psychological manipulation, Harimoto's strength lies in taking advantage of people's emotional states. He first appears in Round 4 as the founder of the Peaceful Paradise cult. Three female members of his cult, Mika Mikamoto, Kei Kimura, and Yukiko Abe, are also contestants in the Liar Game and follow him unconditionally. This gives Harimoto a strong advantage. He controls his cult members by telling them that all humans descend from both humans and demons, claiming that his mission is to gather those with little demonic blood under his guidance in order to restore a nearly pure human bloodline and work towards overthrowing the demons.