Shuichi Natori is a recurring character in the anime and manga series 'Natsume Yuujinchou' (Natsume's Book of Friends). He is a popular actor who also works as an exorcist, specializing in dealing with spirits and youkai. Natori possesses a birthmark in the shape of a lizard, which allows him to see spirits. He befriends Takashi Natsume and often finds himself conflicted between his duties as an exorcist and his empathy for spirits. His complex relationship with both humans and youkai makes him an intriguing and nuanced character in the series.