The Allen Child

5 years after all the breaches to Earth 2 were closed the team discovers a vile of a purple liquid. Caitlin does tests and discovers that, somehow, someone was able to bottle up Killer Frost and Deathstorms powers. Caitlin decided she wants to have powers and help Barry and Cisco catch metas. She takes the substance, and she can now do the things that Killer Frost and Deathstorm could do.

1 year after that happened Barry proposed to Caitlin and she said yes. Right now, she is pregnant with her first child.

And Barry, if you are reading this, hint hint.