Board Thread:The Flash discussions/@comment-27700324-20180418041345/@comment-24152851-20180419003347

That really depends on how Killer Frost came to be too begin with. If she's the result of the state of mind that a cryokinetic metahuman has, then Marlize perhaps had developed her own variant of a Killer Frost personality. But if she was born from Caitlin's internal struggle and it's unique to Caitlin, then that can't be moved via a simple DNA switch.