Migi is a parasite and as such lacks the emotions of a human being. His main purpose is to keep him and his host alive, even if that means killing his own kind, valuing self-preservation above all else. He also isn't above threatening Shinichi at times, such as when he threatened to gouge out his eyes and ears. Migi often thinks of its host as a threat because he is always getting into fights to save others, and he once threatened to harm him to stop him from getting them in any danger