Bonnie Stevens

Bonnie Stevens is a spoiled child, who is also known as the fire-manipulating mutant, Heatwave. Despite being spoiled, Bonnie is one of Eleanor's good friends, even though they don't always get along.

Early Life
Bonnie was born one year after Elizabeth, making her the youngest of the family. As a young child at the age of five, she experienced her mother's death from cancer and became isolated from the rest of her family. This caused her father to verbally abuse her, as well as receive several insults from her older sister, often calling her a twerp.

Discovering her mutant powers
Once Bonnie reached the age of eight, she started to feel as if she was running a fever. She soon found out that she was one of three mutants, whose powers had manifested before puberty. After seeing an ad in a magazine for Xavier's School for Gifted Youngsters