I suspect that this is a bug, but when starting my second playthrough, in the fight with the bullies, the elf, and Ifan in the entry way of Fort Joy, Ifan hit Loise with a Marksman Sting(?) attack by accident (it's the piercing attack). Once the main event concluded, a second fight started up with Loise this time. I tried to see if fleeing the battle would make the hot-headed npcs stop fighting, but when I got back, Ifan had very conclusively ended the fight. Loise was dead on the ground, and I could not resurrect her, nor could I somehow get her in party then resurrect her. I guess the fight was between the two of them all along.

At least there was another NPC I could pick up. . . .