User blog comment:Gifist8/Why The Killer Frost Sub Plot Is Getting Annoying/@comment-27700324-20170307164544/@comment-27700324-20170307225327

Caitlin could do this too you know. Unlike all these other speedsters, Caitlin was THE closest to killing Flash. Literally if Cisco couldn't stop Caitlin from kissing Barry to death, he would be dead. She is his most dangerous foe right now.