Takashi Natsume is the protagonist of the anime series 'Natsume Yuujinchou'. He is a high school student who has the rare ability to see spirits. This ability often isolates him, but it also allows him to understand and communicate with the spirit world. Takashi inherits a mysterious book from his grandmother, Reiko, which contains the names of spirits she had bound to her service. Known as the 'Book of Friends', it becomes a central element in Takashi’s life, as he seeks to return the names and free the spirits. His journey involves forming friendships and understanding both human and spirit worlds, highlighting themes of compassion and empathy.