Here is a review for Anviette

My comments will be in bold

Basics and grounding

Alright some interesting inspirations there.

Character information

Alright this could be interesting but you need a lot more detail in all aspects, especially her personality and description. I recommend a paragraph for the personality because one word phrases don't actually give a good perspective of the character. As far as description, what body type is she? Face shape? How tall? Stuff like that to give a good image of her. Especially when describing a creature that isn't human, you need to give the same amount of detail to her real form.

Relationships

Develop on these relationships and figure out how they interact with one another. Make sure that their interactions count and have an effect on the character.

Also I'm not ever a fan of unknown parents because it can come across as lazy at some point so flesh that aspect out and give some names to her parents and last names to the other characters.

Backstory

Alright so this doesn't actually tell me anything about the characters Backstory. Even though she's forgotten her past, you have to figure out how she got into the mirror and have that written down somewhere because that's what I'm after here. The interactions with the other characters like a story isn't important when you need to write a Backstory for a specific character. So, figure out a story for her from before she was in the mirror.

Other

These powers and abilities make sense and I actually like them. I don't quite understand the reflection opposite thing though, so maybe explain that a bit better.

Stats

Stats are balanced so this is all good.

Final thoughts
I like this character and her concepts, but I think that she just needs some more development and quite a few more details to make her feel more fleshed out and functioning. Detail can be everything in a character so make sure to work on that.

*My critiques are simply at your request and to help improve your character. It is not my intention to cause any offence and you, of course, do not have to listen to what I've said. This is all just a bit of fun and I apologise if I have done any kind of damage*