Ichiro no Oni

Ichiro no Oni was summoned by the ten years old Agasha Ichiro.

Appearance and Abilities
It was a semi-ethereal spirit permanently linked with its summoner. The oni was extremely possessive of its host, because the damage done to either hurt the other. While the oni pulled itself into its body's host, making the skin swell like a balloon.

Summoned
Agasha Ichiro, son of Agasha Dorachi, foolishly summoned the Oni. Ichiro no Oni bound its spirit to the boy and forced him to curse his family, killing them. Agasha Ichiro remained the sole survivor Dorachi's heir.