Han Geu Roo

A 20-year-old with autism spectrum disorder who works as a trauma cleaner for Move to Heaven, over which he took following his father's death. He is smart, has an incredible memory, and is extremely logical, abilities which he uses to uncover untold stories about the deceased through the collection of their important personal belongings. Following his father's practice, Geu Ru places the deceased's most important belongings in a yellow box, which he always insists on handing over to the next of kin; if they cannot be readily found or are unwilling to receive the box, Geu Ru always tries to find a way to pass it on regardless, often to Sang Gu's consternation. Geu Ru also has a minor obsession with fish and marine life, since his parents regularly brought him to a giant aquarium as a child, and he continues to do so as an adult. When he feels panicked, Geu Ru recites facts about fish in order to calm himself. Despite his condition, there are a lot of people surrounding him who understand his situation and try their best to help him and make him feel comfortable.

(Source: Wikipedia)