There's not much time left to react, but Sion does nod at Cecil's suggestion, glancing quickly over his shoulder at the group assembled behind him.

"Keep back!" he warns, before promptly turning his attention back to the apparition in front of him. He braces himself, holding his own blade defensively. Even if he can't strike back, he can still try to parry or block the majority of the blows.

And for anything he can't manage that much for... Well, healing magic or no, he's no stranger to enduring pain.