Verashana "The Grand Priestess" from our Webtoon.
She's usually pretty serious, but I like D3, A2, B2, C3, F4, or A5. You can pick a different one if you'd like too, doesn't matter to me.
Imgur link with her + the other character as well. The other one, Nineval, is goofy and happy all the time so you can pick one of those sort of expressions for her if you end up picking her:
https://imgur.com/a/26eO9I1
Thanks!