This lady has an awesome face, okay. I don't know a whole lot about her other than that she's an English actress and ridiculously hard to find pictures of. Enjoy!
Next up is the lovely Fay Wolf, who is... basically everything. I'll call her a singer (check her out on Spotify, seriously), but she also acts, organizes, and does who-knows-what-else. She's also openly bisexual and trying to dispel myths about bisexuality, which makes her double-amazing.
There aren't a lot of pictures of her out there, but I really like the ones I could find.
Have some icons of the adorable Crystal Kay, a Japanese singer and songwriter. Well... sometimes she's adorable. For a singer, I think her expressions are pretty versatile and would work well for a quirky, outgoing character. Genetically she's African American and Korean, so if you're looking for that specific combo... here you go!
To round off the lady musicians kick, here's Indie artist Sharon Van Etten (once again, do check out her music if you can; it's very thoughtful). She has an incredibly versatile look (I swear she changes her age at will considering the short amount of time that elapsed between the earliest pictures and the latest) and makes some great expressions. Not as many expressions as you might get with an actor, but I kind of like the idea of a musician PB.