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Brook is half-Japanese and has brown eyes and long, black hair, which is cut shorter later by Leanne.
Brook is very talkative, which is the reason many inmates don't like her. She's very passionate about political and environmental issues and sees injustice anywhere. When it comes to these topics, she's very strong-willed and determined.
Poussey and Brook first met each other after Brook tried to kill herself and Poussey found her. After Poussey called some of her friends and they made her throw up the pills she swallowed, she sticked with Poussey.