The Expanse · Character
Cass
- Minor
- First seen · Book 3 · Ch. 48
Cass is a minor character in The Expanse (Book 3).
Which book are you on?
Everything after it stays hidden.
- Gender
- female
- First appears
- Book 3 · Ch. 48
- Books
- 1
A Martian marine, Cass serves as a composed and capable presence in the ship’s security crisis. She reports bad news with professional calm, then fights in an environment suit, carefully directing her fire while moving through zero gravity. The text offers little personal history, but her measured competence and discipline define her role.
Description
Cass is a dark-skinned woman and a Martian marine. In the scenes described, she wears an environment suit and carries an assault rifle, moving with controlled purpose in zero gravity. Her voice is calm and professional, and her bearing is focused and disciplined. The text does not specify her age, build, hair, eyes, or facial features.
Connections
Family & partnersFriends & mentorsRivals

Bullally
Cass is a Martian marine who helps Bull’s group retreat through the airlock and elevator shaft after engineering is overrun.
Story so far
BOOK 3Expanse 03 - Abaddon’s Gate
Appearances
Next stop
In Book 3
Meet Cass in Bookworm
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