Behind her enthusiastic words and actions hides a slightly introverted personality. She is the whole package: Positive and optimistic, enthusiastic and kind. She has short, wavy light green hair that reaches her shoulders and purple, almost magenta eyes. Collei is a light green, female adolescent wild serval cat that was 'rescued' and introduced to the two males (Cyno and Tighnari) by the zoo (as a baby). Her human form consists of her human description as an adolescent, with serval cat ears and tail, plus pawpads and claws.