She has a rare disease called sectoral heterochromia.  It occurs in any species I am pretty sure, but it is really cool. Sorry the image is blurry, I accidentally chose too small of a canvas and yeah...

All white, her main feature is her eyes, she is a medicine cat, kind of snappy, really really really bad at fighting, weak, but has a good heart and is smart about helping others.

"When things go wrong, don't go with them." -Elvis Presley