So who else smashed the soul jar in the cave without realising it was hers

Gratiana, the undead, will attack you if you take off your mask as fane.

Couple of things I noticed:

-Unlike Braccus’ necromancers, she asks you to give her her soul jar instead of smashing it. The only person who does this is Capt. Zapor and his dialogue indicates that he doesn’t intend to die. This makes me think that she doesn’t really want release and instead has other plans. Hopefully those plans include helping people but I found it a little suspicious that she wouldn’t just be happy to finally pass on after all this time.

-Gareth notes that she was disappointed in him when he returned empty-handed, which is a little odd considering that he was risking his life for his people after she encouraged him to find the wands. Everyone else was just happy to have him back. It’s possible that by sending him to look for wands she was hoping he’d find the vault and therefore her jar, and was ultimately helping the seekers out of self-interest rather than compassion.

-She is only forthcoming about her background upon receiving the jar. Before that she refuses to tell you anything and shows a total lack of transparency when questioned, which isn’t really what you’d expect of someone who claims to be repenting for their actions.

Also, I believe I’ve found a bug with the quest. If you absorb her soul in front of her, she’ll die and you’ll get 2100 XP + the items you can loot from her. However, you’ll still have an empty soul jar in your inventory. If you drop this jar on the ground and smash it, you’ll also get 4200 XP as though you smashed it in the first place. The already completed quest will then update and show that you both absorbed her soul and smashed the jar.

I love just how many overly-verbose paragraphs there are in the discussion section for this character. All for the argument of freeing her or not... do what you want, don't let some flowery words try and convince you otherwise. If your gut says to believe her, then do so. If not, then don't. Nobody has any right to tell you how you should feel about the repentance of a fictional character, nor do they have any right to say you are "emotionally immature" for choosing to damn her soul. I'm just putting this here for anyone who reads this in the future, just like I did.

the pretending to give it to her and smashing it on the ground route is pretty cruel