The key element is the particle accelerator explosion which started it all. Another is her internal struggle between her original self, Caitlin Snow, and the emerging Killer Frost identity.
Killer Frost's back story in 'The Flash' is that she was originally Caitlin Snow. An accident in the S.T.A.R. Labs particle accelerator explosion transformed her. She gradually developed the Killer Frost persona, which was at times a struggle for her as she fought between her normal self and this new, more dangerous identity. The transformation brought about ice - based powers, and she had to navigate her new reality within the world of Central City and its super - powered events.
The key element is the accident. Whether it's in a cryogenics lab or due to a particle accelerator, the accident is what starts it all. Another element is Caitlin Snow herself. Her scientific background plays a role as she was in the wrong place at the wrong time because of her work.
One key element is the sense of despair. It's likely that he faced something that made him lose hope, which led to his violent ways. Another is the AU environment. If it was a harsh and unforgiving place, it could have pushed him to become a killer.
The key elements are the bullying he faced, the fire he set, and his face getting disfigured. These things led to his transformation into a killer.
It depends on the specific frost back story. But generally, cold could be a main element as frost is associated with low temperatures.
The key elements are the lightning strike and the chemicals. Barry Allen was in his lab when lightning hit while chemicals were present, which led to his super - speed.
The key elements are Barry Allen, the lightning strike, and the chemicals. Barry Allen is the main character who becomes the Flash. The lightning strike is what causes the transformation, and the chemicals in his lab play a part in the process as well.
The characters are crucial. They drive the story forward. Also, the plot which has a sequence of events. And the setting which gives the context of the story.
In story flash fiction, concise characters are key. Since the form is so short, characters must be quickly defined. Also, a strong plot is crucial. It has to be simple yet impactful, often with a twist at the end. And vivid settings, though not always elaborately described, need to be established well enough to ground the story.
In a flash love story, the first key element is instant attraction. It's like a magnetic pull between two people. Another element is the rapid development of emotions. They quickly go from strangers to having deep feelings for each other. Also, there is often a sense of fate or destiny involved, as if they were meant to meet and fall in love so suddenly.