Shinichi is a thoughtful and nice person who is considered a bit of a wimp. But that changes after the incident in which his mother was killed and taken over by a parasite, resulting in his drastic change in both his mentality and physiology. As the series progresses, Shinichi becomes somewhat distant and unsympathetic, but also gains resilience. His bond with Migi becomes stronger and he occasionally begins to think like a parasite, as how he described the dead dog's body as 'a lump of dog-sha