Caitlin Snow

Dr. Caitlin Snow is a main character of The Flash. She is a bio-engineer at S.T.A.R. Labs and a former scientist at Mercury Labs. Cailtin is the daughter of Carla Tannhauser and an unnamed man. Caitlin was affected by the particle accelerator explosion and after the flashpoint she triggered her meta-human gene and her powers made her develop another personality known as Killer Frost. It's unknown if the flashpoint hadn't been created she would still develop powers.

Early Life
Caitlin was young when her father died and ever since she had a distant relationship with her mother. At some point she started a relationship with Ronnie Raymond and started working at S.T.A.R. Labs with Harrison Wells and was working when the particle accelerator exploded.

Powers and Abilities

 * Meta-human Physiology: Caitlin was affected by the particle accelerator explosion and triggered her gene years after that. It was possibly caused by the post-flashpoint effects but it wasn't confirmed because it could be possible to her develop powers in the original timeline.
 * Energy Absorption/Cryokinesis: Caitlin is capable of absorving energy what allows her to lower the temperature.
 * Enhanced Healing: Caitlin is capable of healing a deep wound within seconds due the nature of her cryokinetic powers. She was able to heal a wound caused by an surgery performed on her within seconds.
 * Physical Appearance Change: Caitlin is capable of changing some of her physical features such as her hair that becomes blond and her eyes become blue.

Weaknesses

 * Meta-human Physiology/Personality Disorder: Due developing cryokinetic powers, Caitlin also developed another personality who is very different from her original self that calls herself Killer Frost. When she uses her powers, Killer Frost is released.