yeah, suppose never talked about Firestorm really?
Original Firestorm was High School student Ronnie Raymond, and his teacher physicist Martin Stein.
Caught in an accident during a nuclear experiment. They get merged in a Dr. Manhattan like deal.
The two minds share one body as Firestorm. Ronnie has control, while Stein provides knowledge. Can split when not together.
Firestorm is the "nuclear man". Again, not on fire. its more like Coronal mass ejection from a nuclear furnace, or solar flare.
He has the power to rearrange inorganic matter, including fission and fusion.
Relation to killer frost. during this period in comics. Killer frost was 100% crazy. She dated Stein at one point, in the past. he was kindof a dick. and dumped her. and she then went 100% crazy man hating lesbian, mass murderer. and got frost powers in another lab experiment involving fridges.
100% irredeemable villain.
Jason Rusch. later version of Firestorm including nu52, has Jason rusch and Ronnie raymond as the two minds creating Firestorm. Both teens. Same powers.
nu52 introduced a new version of Killer frost, with the name Caitlyn snow.
All around there has a been a big push for this character for some reason. Injustice, here. nu52. Assault on Arkham. Young Justice. she was very obscure previously.
This version also is much more sympathetic.
She was a fairly amoral/antisocial scientist, also working on a super science fridge. Her coworkers didn't like her, and were also working for intergang iirc. And, try to murder her. She gets the cold powers.
She's a villain largely because she is simply an energy vampire. needs to suck out "life" energy to stay warm. Firestorm is the only thing that can really satisfy that hunger. and possibly cure it.
Forever Evil she outright turns hero, working for Argus to repel the invasion from Earth 3.
No version of Frost is anything like this tv version really. so, bits and pieces. there is the dating aspect. but, its mutual, or at least seems so. If ronnie rejects her, it will just make him look like the villain. She might get the energy vampire thing.