"I've seen a part of myself no man should ever see."
— Capt. James T. Kirk, Star Trek: The Original Series, "The Enemy Within"
"You can defeat me, Scott. But can you defeat yourself?"
— Gideon, Scott Pilgrim vs. The World
Join now with your better half!
— Vanitas to Ventus, Kingdom Hearts: Birth by Sleep
Bad Ash: I'm Bad Ash! And you're Good Ash! You're a goody-little-two-shoes!
Good Ash: Good, Bad. I'm the guy with the gun.
Good Ash: Good, Bad. I'm the guy with the gun.
"Aw, and I thought we were so close... So nice to finally meet you, face to face!"
— Ghostfreak, Ben 10
"On three occasions have I witnessed these beasts do battle, and each time, I have been sickened. Not by their methods, nor even by the terror they have wrought within our own ranks, but by the fact that to look upon a brother of the 13th Company is to witness the beast within us all given hideous form."
— Inquisitor Asmorales on the Wulfen, Warhammer 40,000
"I am the son of Aku's magic! He has looked deep within you, and has spawned me from your own burning hatred! I am your dark side, and I possess all the powers that you wield. And I have only one purpose in my existence - to destroy you."
— Mad Jack, Samurai Jack.
"I am a Shadow... The true self."
— Every single Shadow, Persona 4
I am a being woven from your mind — your heart — your soul! Can you not see—? I am you! And I fear that we may not both... survive!
— Sandman Superman, Kryptonite Nevermore
Starfire: Listen. When Luthor flew off— I was pretty out of it, but I thought you went after him.
Supergirl: I did. In a way. But it wasn't me. And it's not a good thing.
Starfire: What? Like an evil twin?
Supergirl: I... don't know. More like it was part of me.
Starfire: I have a sister. They call her Blackfire. I feel like I'm responsible for every bad thing she does.
Supergirl: Yeah, well, in this case... I think I am.
Starfire: Do you know where this... "she" is?
Supergirl: I do. She's been in my head... Maybe... All my life.
Starfire: And now? How do you feel having her out?
Supergirl: The truth...? Relieved.
Supergirl: I did. In a way. But it wasn't me. And it's not a good thing.
Starfire: What? Like an evil twin?
Supergirl: I... don't know. More like it was part of me.
Starfire: I have a sister. They call her Blackfire. I feel like I'm responsible for every bad thing she does.
Supergirl: Yeah, well, in this case... I think I am.
Starfire: Do you know where this... "she" is?
Supergirl: I do. She's been in my head... Maybe... All my life.
Starfire: And now? How do you feel having her out?
Supergirl: The truth...? Relieved.
"Guilty! Guilty! My evil self is at that door, and I have no power to stop it!"
—Morbius, Forbidden Planet
"All I knew at the time was that I had a fainting spell," said Supergirl. "While I was out, the real Red K effect came through. The thing... it..." She fumbled for words, then burst out: "I was cloned! It cloned me, and the clone was, well, my evil side. My dark side. And it was just as real as... as real as me."
Part of her seemed to be spinning away, like ectoplasm emerging from a medium's flesh. Her original mass wasn't visibly affected, but another self was being brought forth. It was vaguely coalescing, dummying up into a homuncular shape.
And it was the most horrible thing Hal Jordan had ever seen, but he knew it had to run its course.
It took all his strength to hold Carol back, for her physical self was being drawn to the power-burst. More than that, it took the might of two power rings and her star sapphire gem to keep them apart. The Zamaron guards below watched in terrible fascination at what was happening to their queen, and wondered if they should shoot the Lanterns down, or if the aliens were trying to save her.
And then the only connection between the meta-being and Star Sapphire was a thin silvery thread, which broke like a severed umbilical. It retracted quickly into the main mass of itself, which hardened, coalesced, and defined itself into a humanoid being. One which cupped its hands beneath the purple and green ball of fire. One which was all too familiar to Hal Jordan.
"The Predator," he said, softly.
And it was the most horrible thing Hal Jordan had ever seen, but he knew it had to run its course.
It took all his strength to hold Carol back, for her physical self was being drawn to the power-burst. More than that, it took the might of two power rings and her star sapphire gem to keep them apart. The Zamaron guards below watched in terrible fascination at what was happening to their queen, and wondered if they should shoot the Lanterns down, or if the aliens were trying to save her.
And then the only connection between the meta-being and Star Sapphire was a thin silvery thread, which broke like a severed umbilical. It retracted quickly into the main mass of itself, which hardened, coalesced, and defined itself into a humanoid being. One which cupped its hands beneath the purple and green ball of fire. One which was all too familiar to Hal Jordan.
"The Predator," he said, softly.
"The clone that Joruus C'baoth created to test me with was the fulfillment of my vision in the cave on Dagobah. The reality was no less horrifying than the illusion. Imagine looking at your reflection in the mirror and seeing only... an enemy."
—"Mirror Image", The Last Command Sourcebook
