I actually never managed to kill her in combat, pretty sure she is always supposed to get knocked out so her cutscene can play out. But yeah could probably be tied to an evil Shadowheart as there tons of inconsistencies and wrong registries with evil decisions in general that I've been observing. Very little care has gone into evil decisions unfortunately.
Luckily however I finally finished Honour Mode today so it's back to the regular scheduled program of playing Tactician so I can now properly report all this stuff to Support
