- This article is about one of the two humans whose fusion makeup the conjoint meta-human Firestorm. For the meta-human, see Firestorm. For other uses of "Firestorm", see Firestorm (disambiguation).
Vigilante (as Firestorm)
Member of the Legends (former leader)
Ally of Team Flash (in secret; former member)
Scientist at S.T.A.R. Labs (altered reality)
|Family|| Unnamed (father)|
Clarissa Stein (wife)
Unnamed (daughter; post-flashpoint)
|Actor|| Victor Garber|
Robbie Amell (in control of Ronnie's body)
Graeme McComb (young)
Professor Martin Stein is a physicist who was the team leader for the F.I.R.E.S.T.O.R.M. project. He co-wrote a paper on it with Jason Rusch. He is also one half of the transmuted and conjoint meta-human, Firestorm.