Tragic events in Teru Mikami's childhood convince him that God wants him to stand up to evil. As a result, when criminals everywhere begin to die, Mikami believes that this is God's judgment and becomes a frequent guest on Kira's Kingdom.

After Light gives him a Death Note, Mikami becomes ecstatic and passes judgment on criminals in Light's stead. He chooses a new spokesperson for Kira: Kiyomi Takada, who happens to be one of Light's girlfriends in college.