I don't, but plan on releasing a larger resolution sprite for her.
Can I ask what the resolution of your game is?
Viewing post in Rin - Free Character Sprite comments
Sometimes larger sprites being put into certain programs/engines can make it look pixelated if the original sprite is larger than the project and sized down within the program.. If you have an image adjustment program that you can resize the sprite in to fit your game size specifically, it should help. Let me know if it doesn't.