First off:
Is Annabelle a native of Oublioth or not? The history does not make this clear, as it's written from a narrative first-person view, followed by a description of a realm that is seemingly seperate from the main world. In the case that she is an outsider, this would not be acceptable, as players are supposed to be natives of Oublioth. If she is a native who got trapped in some sort of shadowplane or minor pocket-world, this needs a bit more clarification.
She's a native. The 'being separate' is merely flavor. I didn't intend to mean that is was something like a different dimension or world. Certainly not in an isekai sense. Magically sequestered, more like. A pocket region, normally inaccessible except by intent or a stroke of bad luck.
Admittedly I know I took a bit of liberty with creating this place in terms of worldbuilding. I assumed, given other's histories that adding in things was fine, albeit everyone else thus far has just been pointing to kingdoms and the like. If you want the fundamental details to this place, I'd be more than happy to send them to you over PM. I was already going to do so, but you got to the review faster.
Additionally, if the only living things in the pocket-plane were Annabelle, the Spirit and the Wraith-monsters, how did Annabelle manage to survive for - what I assume - is years in there? The lack of food, safe shelter, drinkable water as well as the seeming absence of sunlight would all make it near impossible to survive, unless time was somehow also warped in that place.
"No man remained save herself, this wood-surrounded castle city populated only by three things: the various natural fauna of the land, somehow surviving in a desolate, malevolent place..."
The water is untouched, as this is a curse upon the land's creatures first and foremost, and an entire castle, forget the surrounding village, yet remain standing in the region. She was granted what amounts to a light spell to help her upon her arrival, which is supposed to be insinuated to be from the landgod that eventually helped her. Again, I can always give details on this over PM (unless you want it to be out in the open here).
Moving on from her history, we come to her skills and class. She is listed as a Summoner, but has stats and equipment more suited for a barbarian or melee-fighter. Now, I'm not one to tell you how to build your character, but it seems a bit odd for a person who relies on summoned monsters to fight for them to fight on the front-lines themselves.. Albeit, she doesn't seem to be your typical Summoner.
I'm not much of a DnD player, which is to say, I've never actually played DnD. I know all the basics behind it, but things like classes, stats, etc... I'm not familiar with. Obviously your typical summoner in most media isn't a spellblade, but I wasn't sure what else to call her without using a made-up class (and even then I honestly wasn't sure what I'd even name it!). But I'd also like to point out that her Intellect is B, definitely not low by any means.
This brings up another question though: If she was isolated in a world with only monsters who constantly hounded her, how did she have time to get her INT so high? Who taught her? How did she study? Where did she learn the spells she knows? There is no explantion or input about how or why she knows the things that she does - and putting an "amnesia"-censoring on the reasons is sadly not going to fly. If your character knows how to do things, especially magic, you need to specify where and how they learned that.
"With sunless years did she learn under the forgotten landgod until she was bade to leave Holzwand for the wider world."
It's supposed to be implied it taught her the magic, whose nature I can (once again) detail by PM if you'd like. There's a wider flair to this that I didn't necessarily want to reveal in the sheet. All of this occured after her arrival in Holzwand, not prior. She definitely didn't just "get" all this stuff without any mention.
Also, her immunities. I'm sorry to say but being immune to "forced" fear by magic or abilities is not an option. Either you're entirely immune to fear, or you're not. You can have a natural high threshold for it, but as a (what I assume is still a regular) human, you don't really have the capacity to be immune to such an emotion, no matter how horrible or traumatizing your life's been...
... Unless there's something mentally wrong with Annabelle, or she suffered a lobotomy.
I don't have as much of a reasoning for this one besides personally feeling that an intentional manifestation of fear could be thought of as different from an inherent fear of something. Being a spell, I simply thought that it would have an 'elemental quality' in a sense, and distinguished it from simply being 'darkness element'. I can remove it, ultimately.