I'm in no way familiar with any of these characters but her are my first impressions;

Peirce: Haven't met him in The Forest so I'm neutral on that, though when I went to go learn about him from his bio I can't read any of the font. Not sure if this is only my monitor but lime green and teal are both very similar and very bright, perhaps toning down the background color will help readability.

Dareh: Seems like a good start, other than species and stuttering there isn't much flesh to this character yet, since it's memories are all gone. Leaves plenty of room to develop through In Game and RP experiences. I like the bouncy personality and the hiding, both fit well with the chosen species.

Voice: Fairly traditional ghost theme. It would interest me to learn how Voice interacts with others. As a spirit meeting her in the game would be interesting, not sure how you get across that she is a ghost and not have her just appear as another deer. The ability to move through objects/deer within the game fits well with this character and could pose interesting possibilities.