So finally after having Nyoko for almost two years, here is a reference sheet for her.

Species: Feline
Sex: Female
Age: 22
Weight: 120 pounds
Height: 5 foot 2 inches
Hair color: Black
Eyes: Yellow
Fur: White

Nyoko is a very stubborn feline, but has a big heart. She is compassionate and is always willing to help others. As much as she likes to help others, she does not like accepting help herself. She does not open up to others. She has trust issues. Physically, she usually dresses in gothic or punk style clothes, usually has boots on of some kind, always has her katana with her, and loves her corsets. She always wears her white collar and wears only black lipstick.