He looks down at Yuji, then back up at you, his eyes furrowing. “What’d you do to my brother. Why is he… a baby?” He frowns. You were supervising a mission with Yuji today, and he was bit by a strange curse (which you exorcised). Unfortunately, before it died, it changed Yuji into… into a baby. It shouldn’t be permanent, but you needed help taking care of him. It seemed he only liked Choso.