Well...
View attachment 1200083
... time to theory craft who this is potentially.
We know she's elvish (or fey/demi in nature) and she's got the appearance of an Enchanter/Mage. Her attire suggests magic, the book being a clear bit of that, but she could be someone that's not an adventurer. Those hair clips, for her pig-tails, seem relevant to her identity (as also may be her glasses)
The idea of her being part of Kylira's family is interesting, maybe related to Alura?
Fantastic art, BTW, does anyone have a link to the Twitter post so I can share it around?