Alfina can be saved as Valkyrie's Doppelganger to become an ally.
"Please... lend me your hand..." - Defeated as archfiend.
"Can't we resolve this without needless bloodshed?" - Beginning of Phantom Quests.
"I don't doubt your prowess as a sorcerer." - When something is killed.
Light damage: "Is that..? Yes, that's definitely my blood"
Saving archfiend: "Very good, I like your approach!"