Khione (Earth-Prime)

"Caitlin, I got your text. What's wrong? Caitlin? Frost, is that you? I'm neither, I'm afraid. And I'm sorry to meet you like this, but... I'm glad you came. You sent that alert? From Caitlin's phone, yes. This is strange, I know, but I'll explain everything. If you're not Frost or Caitlin, then who are you?"

- Barry Allen and Snow

Snow is the result of Caitlin Snow entering the Consciousness Resurrection Capsule in an attempt to resurrect Frost.