Earth 2,

Caitlin Snow was a very well accomplished woman her age. She graduated from medical school a year ago,she was highly skilled surgeon and she had a well mannered boyfriend. Everyday she worked to save people's lives because that's what her brother Charlie would of wanted. But to be honest the only thing terrible in Caitlin's life was her mother and her coldness. Her mom wasn't the nicest people in the world but she started acting like that every since her brother died. But Caitlin didn't fouces on it too much she had lives to save and boyfriend to love. But all that changed when she Met Bill Cipher, Harrison Wells (this Wells is the reverse flash), and Dr. Doofinshmizte.

They wanted her help to build the Partical Exculaitor because of Caitlin's background in Chemistry. Caitlin was thrilled to be working with Dr. Wells because as soon as he asked her, she jumped right on board, unaware of the villains real motaives.

A year later the particular Exculaitor was built and Caitlin and other sciencetest where running some test. But something went terrible wrong. The particular Exculaitor explored and poor Caitlin was blasted by the dark matter.

When she woke up in the hospital she felt cold and she looked very pale. She thought she was sick but the only thing on her mind was her boyfriend Eric. She wondered why he hasn't visited her. A few days later Caitlin checked out the hospital much to the doctor's annoyounce and went home.

But once she got home she was in complete shock. Eric the man she loved was kissing another woman. She was in the hospital and he cheated on her with a another woman ! Many emotions rushed though Caitlin. Shock, sadness, and rage. She felt rage flowing within her as her eyes glowed an icey blue, her hair turing white and her hands forming ice. Eric was shocked as he tried to reason with Caitlin... but she wasn't Caitlin anymore... she was a murder and she let him know it before she killer him and that woman. She was now Killer Frost

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Killer frost roamed the forst in the snow after she fled her house in order to avoid the cops. As she walked further into the forest she was slowly becoming something cold and bitter as she craved heat. Suddenly Bill Cipher appeared and offered her a deal she couldn't refuse and Killer frost took it.