Endou is a main character in the short Shounen Ai, Endou-kun no Kansatsu Nikki. He is quiet boy who seems to express no interest or care for anyone, including himself. He later peaks the interest of his classmate Tsuda who sits behind him in class. His personality is mysterious throughout the story as it is hard for him to express his feelings to others. However, eventually he opens up to Tsuda and their relationship grows.