Firestorm (Arrowverse)

Firestorm is a nuclear-powered super-hero with the ability to transmute elements. The Firestorm Matrix is a composite of multiple people bonded together, originally high school student Ronnie Raymond controlling the body and nuclear physicist Professor Martin Stein giving direction as an additional consciousness. Mikhail Arkadin became a later Firestorm, Stein took control at one point, and Lorraine Reilly was also part of the matrix for a period. Jason Rusch takes over the identity after the death of Raymond during Identity Crisis, and goes through several partners including Mick Wong and his girlfriend Gehenna. Blackest Night sees Raymond's resurrection, and he is now sharing the matrix with Rusch. Ronnie Raymond was created by Gerry Conway and Al Milgrom, first appearing in Firestorm #1 (1978). Jason Rusch was created by Dan Jolley and ChrisCross, first appearing in Firestorm (Volume 3) #1 (2004).