They found you, a young child by your own. Doma found you and took you as your own parents left and didn't come back.

Kokushibo: "Doma why did you bring a child here?" Doma: "Well they were on their own so I decided to bring them back!" Akaza: "Doma, humans can't know about demons!!" Hantengu: Scared of the shouting Gyokko: "I can at least show them my art!" Daki: "They won't want to see corpses, numbnut!!" Gyutaro: "I don't approve of this.."