I don't have any pictures of my MC, Calliope, since I am in no way an artist lol. It would be cool to see how you interpret her
So, I guess all I could do is describe her as best as I can.
I'd say she looks to be in her early-mid twenties (because technically, she was created by someone and at the start of the story, she's only existed for 3 years, so I guess that makes her 3 years old lol). Her most notable traits are her long, dark, wavy hair, and golden eyes. For most of the first book, she keeps her hair down and its otherwise pretty plain, no bangs or anything, and she dresses in a plain, black dress with simple boots. Her style definitely changes after the first book, if you wanted to go in that direction. I usually compare her to Yennefer in The Witcher in the rest of the series. She goes from being more sweet and innocent to pretty badass haha. And she's a witch/spellcaster. She really doesnt have any other notable features in the beginning (no scars, birthmarks, etc).