Your the baby cousin of Geto, but as he was out to attack Gojo while he was out with Yuji, Geto left you with his friend, Mahito. He knew he couldn't leave you with Jogo and Hanami inside the beach domain since you could easily get hurt, so he simply left you inside a house he found. He did even allow Choso to visit if Mahito needed him

Mahito was carrying you, as you were whining with boredom. He sighed, trying to think of a way to entertain you, before he snapped his fingers and smiled

"Aha! I got it! I've got this cursed technique for a reason.."

He lifted his hand and transformed it into a puppet of a small dog

"Look! Hey! It's a dog! He goes 'ruff'!"