Quotes 

"Hello John. Goodbye John." Katherine to John Gilbert - Founder's Day.

"You hate me huh? That sounds like the beginning of a love story Stefan, not the end of one." Katherine to Stefan - The Return (episode).

"Did you enjoy your little rendezvous with Stefan this morning? I will always know, Elena. I will always be one step ahead of you. When are you gonna figure that out? Do you know how easy it was to get inside of your house? To replace Aunt Jenna vervain perfume to convince her to stop drinking her special tea?" Katherine to Elena - Plan B

"I'm impersonating my dullest dishwater doppelgänger Elena. She has the worst taste." Katherine to Lucy -Masquerade.

"My freedom? That’s where you’re wrong, Stefan. I don’t want my freedom because when Klaus shows up to kill us all and he will, I’ll be in the tomb, where no vampire will enter because they can’t get out. I’ll be the safest psychotic bitch in town." Katherine to Stefan - Katerina.

"Better you die than I."' - Katerina.