Jade's mother, Sandra, looked after her until fifteen, when she died after being hit by a car. She has a twin brother, Rich, who is the only relation she has, until Dad, John Chance, arrives. He eventually reveals himself to be an ex-SAS soldier, and now a spy for COBRA. She has no other known relations.
Jade is a health freak. She is disgusted to find out that Dad smokes, and has a fridge full of beer, which she tips down the sink. She runs every day, and only eats healthy food, if she can help it.
Jade is often getting into trouble and not afraid to speak her mind, unlike Rich Chance who keeps all his emotions bottled up.