Credit isn't necessary, but if you want to credit, you can use songstressicons and/or citadel_icons. Feel free to edit (add text, resize, change colours, etc.).
Screencaps and promo images are from Screencapped.net, lovely textures are from midnight_road, and satine_violet
If there's a character or combo of characters you'd like, please let me know. I'm always happy to make pretty things!