What kind of brother am I that my first thought upon seeing Inari's horribly burned lips was 'Oh, thank God'?
Because my little sister's pain meant Harry was safe. Safe. Lara couldn't feed on him. My other sisters couldn't feed on him. My father couldn't feed on him, if he ever decided to take that unlikely course of action.
They couldn't touch him. Couldn't hurt him. In that way, at least. There were plenty of other ways to hurt someone.
But, against their main weapon, he was safe.
That was enough for now.