Migi is a sentient parasitic organism that takes over the right hand of Shinichi Izumi, the protagonist of the anime series 'Kiseijuu: Sei no Kakuritsu' (Parasyte: The Maxim). Unlike other parasites that aim to fully control their host's brain, Migi is unable to do so and instead forms a symbiotic relationship with Shinichi. Migi is highly intelligent, logical, and curious about human behavior, serving as both protector and advisor to Shinichi as they confront other hostile parasites. This dynamic partnership drives much of the series' narrative tension and philosophical exploration.