She has the reponsibility of finding out who killed her father, and dawning two guises...her normal form and this killer mechanism form. When trouble occurs, Rose has the ability to transform her entire body into solid gold metallic armor becoming Foxfire. In this form it is nearly indestructible...having a few flaws that causes her to experience pain. The trouble Rose has isn't with her peers anymore but with high-tech groups such as Ultraforce, traveling back in time because Foxfire is wanted for hanious crimes against their agency. Rose doesn't know why these groups are after her...but being the firecracker she is...isn't going to go quietly. Now, living the life of two being, Rose has to learn to cope with high school, guys, and worst...the intergalatic's own strongest heroes and heroines.

Born and raised in the luscious city of Rio de Janeiro, Beatriz (Bea) Bonilla da Costa, was a lackluster Brazilian model and artist, until when, after losing quitting her job, she managed to get a new one in the Brazilian espionage network. She surprisingy proved to be one of their best spies, mastering as no one else the use of a pyroplasm ray gun created by them which could turn organic stuff (pyroplasm) into energy. However, this powerful gun was stolen by the son of one of Bea's ex-bosses and she was assigned to recover it. During the mission, she used the pyroplasm gun and eventually blew the whole place up. No one was injured, but Bea, as a result of the energy liberated by the pyroplasm rays, got the ability to breathe green flame. She also became wanted by Brazilian secret service because of having disobbeyed their orders to keep the mission secret and discreet and bring back their secret pyroplasm weapon, which was totally destroyed.

So, she decided to escape, dyed her hair green, and flew Paris to join the Dome and become a Global Guardian. There, she met the heroine who would become her best friend, Ice Maiden II, Tora Olafsdotter, a princess of the mythic Ice People of Northern Norway who was found by a team of scientists and decided to leave her homeland to know the warm bodies' world. When the Global Guardians were disbanded in favor of the Justice League International, needing money, she decided to join the JLI and persuaded Ice Maiden II to go with her. She practically forced their acceptance by the JLI, but proved to be a valuable ally, alongside with Ice Maiden II, during the invasion of Lord Manga Khan.

A while after joining the JLI, Green Flame changed her name to Fire, convincing Ice Maiden to be called just Ice. During the Invasion, the gene-bomb deeply affected her. Her powers went out of control, she got in coma for a couple of days and stayed very sick for a while. Then she found out her powers were awfully expanded and improved, she became able to turn her whole body into a green flame, fly and be virtually intagible in this state.

In the fight against Doomsday, she used her powers to their whole extension and her flame seemed to have burned away, until the attack of the Overmaster, who mentally controled and apparently killed Ice, facts that ligthed Fire again.
When the first Ice Maiden, the Norse scientist Sigrid Nansen, who volunteered in a test to artificially duplicate powers of the Ice People, joined the League, she somewhat came on Fire, taking advantage of her resamblance to Tora and their old times at the Global Guardians. Ice Maiden was probably the first bissexual member of the Justice League.

However, Bea and Tora's relationship had always been just a strong friendship, a sisterhood, and Nansen soon dropped out this idea and got involved with Olivia Reynolds. Bea is reported to be dating Guy Gardner, a relationship that was born from the mutual mourning of Ice (Tora). She continued as a member of the League through its various crises since then until the current incarnation, to which she wasn't invited.

In the 1st issue of the current JLA series, Ice Maiden mentions Fire as having lost her powers once more. This happened due to the white Martians who became known as the Hyperclan used a device that inhibitted the powers of all the heroes who had them based on fire. When they were defeated by the Justice League of America, Fire got her powers back. She's still active throughout Latin America and especially in her home country, Brazil.

Sometimes, she joins forces with Martian Manhunter, her former colleague at JLA to cope with some latin-american super-villains. She mistook Cameron Chase for a journalist and unintentionally revealed important details about J'onn J'onzz and now has Chase in her list of enemies. Her most powerful enemy, though, seems to be sexism in Brazil and Latin America as a whole, which causes her to be underestimated as crimefighter just because she is a woman.