Kasi has dull tan fur with light grey paws, underbelly and muzzle. Her eyes are blue. Her nose is pink and pointed, her inner ears are dark and light brown, and she has a large tuft of fur on her head. She has three large, light brown markings placed on her sides, just after her ribs. Her tail tip is brown.
Kasi has a very thin and lithe build, being much thinner than the other lionesses and more flexible. This helps her run incredibly fast and make it through a set of twists and turns at speed.