|Birth name||Gabrielle Ruthven|
|Appearance||Tall, skinny, dark skin, hair and eyes|
|CHERUB career|| Seven years|
Seven as a qualified agent
|First Appearance||The Recruit|
|Last Appearance||Shadow Wave|
Gabrielle O'Brien (Born Gabrielle Ruthven) was a CHERUB agent.
PHYSICAL: Tall, lean and skinny, Gabrielle has great stamina and is stronger than most boys her age, Jamaican.
COMBAT: Gabrielle handles herself marvellously in a fight, able to hold out against several opponents simultaneously .
ACADEMIC: Although she is undeniably bright, Gabrielle does not really enjoy school work.
LIKES: Hanging around with Kerry Chang, cross country runs.
DISLIKES: Guns, peanuts, being racially abused.
Her mother and father were officers with the Jamaican police force. They both died in a car accident in 2002.
Gabrielle is in the beginning of the book and the Cherub agents are on a holiday. They train by her and Kerry getting in a paintball fight with James and Bruce. Gabrielle and Kerry win and they return to the base. There is a scuffle between Bruce and Kerry and Kerry injures her already damaged knee. They all get sent back to Cherub two weeks before the holiday is over even though James and Gabrielle didn't do anything.
Man vs Beast
Gabrielle gets stabbed in the back by a runt in a street brawl.
===The General=== Breaks up with long term boyfriend Michael Hendry (born Jordan LinMILK