"Firestorm is the name used by the transmuted people that were mutated by the Particle Accelerator in a specific manner. The first duo to form Firestorm were Ronnie Raymond and Martin Stein. After Ronnie's death, and Martin's failing health because of spending a significant amount of time unmerged, Barry Allen and his team were able to track down Jefferson Jackson to substitute for Ronnie. Briefly, Valentina Vostok merged with an unwilling Professor Stein as Soviet Firestorm during his time travel adventures as part of the Legends." ()