Itachi smiled warmly. "I can't clean your brother's scratches if I can't get to them, Isamu... He'll be all right. I promise."

He poked the older twin in the forehead.

He probably would have praised the younger for showing considerable restraint instead of fighting. But the boy was more shaken than anything else. And once he calmed down, he'd probably be back to biting Isamu to get him off.