Quotes / Split Personality

"Hello, me, meet the real me!"
Megadeth, "Sweating Bullets"

"And I'm a million different people from one day to the next..."
The Verve, "Bittersweet Symphony"

"Isn't it true that at these times [Fred Flintstone] often descends into a delusional state, sometimes actually adopting another person's persona?"
Harvey Birdman, Harvey Birdman, Attorney at Law

"I used to be schizophrenic, but we're fine now."

"There's just one problem... you're talking to the wrong Harvey."

"That wasn't me, that was Two-Face!" / "Harvey's not here right now!!!"
Harvey Dent / Two-Face, Anytime (t)he(y) shows up as the main villain.

"When you want to do something as Nana, you can be Nana! And when I have something I need to do, I can come out."
Yaya, Othello

Fiona and the rest of her personalities-Chapter 17: Fiona

"Schizophrenia... When the left hand doesn't know who the right hand is killing!!"
— Tagline for the film Schizo (1976)

O'Malley: Get out of my head!
>Doc: Technically, it's my head. But I don't mind sharing!

Fluttershy: You just want new Fluttershy to be a doormat like old Fluttershy! But old Fluttershy is gone!
Pinkie Pie: New Fluttershy... old Fluttershy...!?
Rarity: What happened to nice Fluttershy? We want that Fluttershy back.
Fluttershy: No, you want wimp Fluttershy. You want pushover Fluttershy. You want do-anything-to-her-and-she-won't-complain Fluttershy!
Pinkie Pie: Nyaaaaah! Too many Fluttershies to keep track of! Make it stop!

"Mr. Walker owns a motorcar and considers himself a good driver. But, once behind the wheel, a strange phonomenon takes place. Mr. Walker is charged with an overwhelming sense of power! His whole personality changes! abruptly, he becomes an uncontrollable monster! A demon driver! Mr. Walker is now MR. WHEELER, a motorist!"

Good!Krieg: I don't know the dead man. Probably didn't deserve what he got. Doesn't make him special, though. All kinds of people die out here: the innocent, and the not-so-innocent. If I'm lucky, he hasn't noticed me yet. I want to warn him, to tell him to run, to hide, to get out of sight so I don't have to kill him. That's what I want to say. But what actually comes out of my mouth is-
Good!Krieg: ..... Close enough.

Raymond Falcon is a very skilled musician, just like his father. Dirk MacGriff is a police officer, just like his father. Bruce Holmes is gay, just like his father. Lawrence Pierce is a doctor, just like his father. Baron Wittger is a vampire, just like his father. And yes, all these are the same person.
—Notes on Evan Klein note , Vampire: The Masquerade - Chicago By Night

Jekyll: All that you are is a face in the mirror! I close my eyes and you disappear!
Hyde: I'm what you face when you face in the mirror! long as you live, I will still be here!