Collei has short, wavy light green hair that reaches her neck and purple eyes that almost touch magenta. When she first appeared in the manga, much of her body and face were covered in bandages. She wore baggy trousers, one that resembles a sirwal, and a tapper hat made from bandages. Tied around her hips is a green-orange cloth. When she joins in investigating Fatui devices, Amber lends her one of her old clothes for Collei to wear. She also has a beige satchel for where they keep the collected devices SPARKLE; GLITTER

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