Beneath this mask I wear
There's nothing of me,
Just horror, shame, despair...
Why does she love me?
—Raoul, Love Never Dies
"Everyone sees what you appear to be, few really know what you really are."
—Niccolo Machiavelli, The Prince Chapter XVIII
—House, House M.D
"Commander, I want you to understand, I acquired human characteristics... to bring your people and mine closer together. To symbolize our mutuality. It is supposed to be a dignified, inspiring transition for both humans and Minbari. So will you please explain to me why this... Hair. Refuses to cooperate?"
—Delenn, Babylon 5
Here is my real head, here is my real head
I wear this fucking mask because you cannot handle me
Here is my real head
—Marilyn Manson, "Organ Grinder"
A pure white mask, in contrast to her own Arab ethnicity. She’d meant to make a point of it, to challenge people to wonder more about what was behind the masks, about their assumptions about heroes and villains. Belatedly, she said, "We act too much. Hide behind masks way too often."
— Sabah, Worm
"Are you surprised, dreamer? Are you surprised that I could be so much less of a man within? Do not be."
—Laenan Kite, Mirror Dreams
"In [Loki's] head there is a voice, wild with laughter, crying, Reject me, try it, lay one hand on me again and you will be atoms, all of you, and your pathetic ruin, nothing but dust. Outwardly he holds to that slight, polite smile."
So ya thought ya might like to go to the show
To feel the warm thrill of confusion that space cadet glow
Tell me is something eluding you sunshine?
Is this not what you expected to see?
If you wanna find out what's behind these cold eyes
Mirror, tell me something...
Tell me, who's the loneliest of all?
Fear of what's inside me...
Tell me, can a heart be turned to stone?
Mirror, mirror, what's behind you?
Save me from the things I see,
I can keep it from the world,
...You may think that person is perfect or that everyone likes her/him, but people do have flaws. And there are always people who acknowledge those flaws. And there are always going to be people who don’t like you for whatever reason.
If you think someone thinks that she/he is perfect, then that person is probably putting up a front. A lot of people are insecure, and acting super confident (or faking it until they make it) might be their way of coping. Everyone has flaws and knows that they have flaws, even if you personally do not see them acknowledge those flaws.
Laughing. Kicking. Clapping on the beat. Feeling her somewhere behind him, doing the same. Wondering if she wanted as badly as he did to be out of here, to be in the dark, to be alone in the dark, where he could put his false face aside before the real one beneath could grow hot enough to set it afire.
— From Wizard and Glass, by Stephen King
So go ahead and bat your eyes and lie right to the world
For with everything you are, you're just a little girl
— "Just A Little Girl" by Trading Yesterday
Why should you care, what they think of you
When you're all alone, by yourself
Do you like you? Do you like you?
— "Try" by Colbie Caillat
"We are what we pretend to be, so we must be careful about what we pretend to be."
There before me, from this girl who'd never shown anything but self assuredness, was a catalogue of failures.
—Shinji, The One I Love Is, chapter 6
Well we all have a face that we hide away forever
And we take them out and show ourselves
When everyone has gone.
Some are satin, some are steel
Some are silk and some are leather.
They're the faces of the Stranger,
But we love to try them on.
— Billy Joel, "The Stranger"
In short, Yandere-chan is always insane, 100% of the time. Her sanity does not rise or fall. Instead, what rises and falls is her current level of composure; her current ability to hide her true nature. As Yandere-chan performs acts of cruelty, her composure will slip, and her true face will begin to show.
— The developer of Yandere Simulator, discussing its psychopathic main character
Everybody you know is nothing more than a collection of habits, idiosyncrasies and speech affectations for you to play with. You know which personality or mannerism best amuses others, but you don't have a developed personality of your own. You entertain and harangue other people, because you're afraid your friends might realize how dull you actually are. You haven't "looked" like yourself this last month: you've always been somebody else, pretending at an existence not your own, playing for the appreciation of others. In public, you're the unlife of the party; in private, you bore yourself to bloody tears.