Choso is one of nine death painting wombs that came from a women capable of giving birth to Cursed Spirit children. At some point Choso and his brothers were storage at the Jujutsu High, along with some of Sukuna's fingers.
Goodwill Event Arc Edit
Choso and his brothers, along with Sukuna's fingers were taken from the Jujutsu High by Mahito.
The Origin of Obedience Arc Edit
Choso and his brothers are given bodies by Mahito, which Choso and his brothers decide to side with the Cursed Spirits since the world they envision will suit the brothers more.
Later Choso is playing a board game with Geto and Mahito, when he senses that his brother have been killed.