She appears to be a normal princess except she dresses like a sorceress witch, her eyes can find the weak spot of any foe and her hair is golden and she wears it just like sailor moon, but secretly she is actually a half-catgirl.
She is an interdimensional traveler created to be the next step in mankind's evolution and she will fight her enemies with the power to summon meteor strikes by playing on a magical flute or to impale people on her dick.
Her friends and enemies call her Soulfur Riverbreath!
Her constant companion is a living amorous cat who is also one of her failed experiments.
Her favored weapon is a magical freezing flamethrower which will automatically protect her friends.

...she's a girl. She should not have male parts. *shakes head*

"She appears to be a normal woman except she dresses like a sorceress elf, her eyes reflects your soul when you look into them and her hair is brown and sparkles in bright light, but secretly she is actually a half-pixie.
She is a megalomaniac raised by wild animals and she will fight her enemies with the power to seduce any mortals or to corrupt demons.
Her friends and enemies call her Mysterylover Riverbird!
Her constant companion is a sparkling invisible neckbearded man who is also her superior officer.
Her favored weapon is a poisoned steam-powered rapier which makes anyone hit with it her slave."
This website is Comedy Gold, good sir!

"She appears to be a normal student except she dresses like a foxgirl monk, her eyes are multifaceted and her hair is five different shades of red and is so flexible and strong that a single hair can be used to make bowstrings, but secretly she is actually a half-fire-elemental.
She is a lost time-traveler working for the church and she will fight her enemies with the power to seduce any mortals or to eat demons.
Her friends and enemies call her Lightcreator Skytree!
Her constant companion is a enslaved brain washed fertility goddess who is also a figment of her imagination.
Her favored weapon is a burning legendary knuckle dusters which will appear in her hands when she calls it."

...now I want to write that. Just to see.

She appears to be a normal journalist except she dresses like a punk rock skateboarder, her eyes can see people's chakra flow and her hair is crimson red and is worn in large spikes, but secretly she is actually a half-catgirl.
She is a holographic projection in search of true love and she will fight her enemies with the power to corrupt mortals or to absorb enemies into her body.
Her friends and enemies call her Dayhammer Candyblossom!
Her constant companion is a flying young dog who is also secretly in love with her.
Her favored weapon is a conscious poisoned dagger which can be made invisible at her will.

It's...not actually as self-contradictory as a lot of them.

"She appears to be a normal lawyer except she dresses like a gestapo officer construction worker, her eyes reflects your soul when you look into them and her hair is rainbow colored and flows like silk but is stronger then diamond, but secretly she is actually a half-slimegirl.
She is a megalomaniac who is the last of her kind and she will fight her enemies with the power to take the shape of anyone she ...s or to charge into battle riding specially trained battle-retards.
Her friends and enemies call her Dragontits Deathspring!
Her constant companion is a angsty young werewolf who is also her father.
Her favored weapon is a adamantium legendary whip which makes anyone hit with it her slave."

...Dragontits? That's a new one.

She appears to be a normal mechanic except she dresses like a gangsta schoolgirl, her eyes reflects your soul when you look into them and her hair is rainbow colored and is long and straight, but secretly she is actually a half-android.
She is a space traveler travelling through time and she will fight her enemies with the power to re-animate the dead as her slaves or to connect any machine directly to her brain.
Her friends and enemies call her Dragonbeast Cherrybreath!
Her constant companion is a amorous mysterious zombie who is also her means of transport.
Her favored weapon is a blessed shining chainsaw which is covered in rare gems.

...Weird enough for ya?

She appears to be a normal sumo wrestler except she dresses like a pirate shaman, her eyes are multifaceted and her hair is crimson red and is surrounded by a dark aura, but secretly she is actually a half-foxgirl.
She is a secret agent created by Nazi scientists during World War II and she will fight her enemies with the power to eat vampires or to gain someone's strengths by eating their brain.
Her friends and enemies call her Shadowlover Unicornbranch!
Her constant companion is a over-analytical over-analytical super saiyan who is also her mentor.
Her favored weapon is a poisoned steam-powered poleaxe which can be made invisible at her will.

I... what...

She appears to be a normal nun except she dresses like a elf witch, (I doubt elf witches dress like nuns, so I doubt she appears like a nun) her eyes glows (sic) with arcane power and her hair is white and is short cut, but secretly she is actually a half-zombie.
She is the leader of a ninja clan devoted to the gods of chaos and she will fight her enemies with the power to impale people on her dick or to transform into a dragon. (A hermafrodite half-zombie who can shape shift into a dragon? I think we passed Sue and went straight into TROLL territory.)
Her friends and enemies call her Sparkleender Skyviolator! (SS for short.)
Her constant companion is a murderous mysterious Space Marine who is also secretly in love with her.
Her favored weapon is a blessed ancient sniper rifle which shines bright like the sun. (I like these last two bits. I could work with those. Can I has a few more goes on the machine till I can mix and match a Sue I can work with? )

She appears to be a normal teacher (A normal teacher? I never had one of those.) except she dresses like a J-pop star mad scientist, (I really hope she covers "She Blinded Me with Science" frequently) her eyes can find the weak spot of any foe and her hair is navy blue and she wears it like an afro, but secretly she is actually a half-werewolf. (When the full moon rises, her legs are transformed into those of a monstrous hound. You could also correctly refer to her as a merwolf.)

She is the daughter of the president with a mysterious past and she will fight her enemies with the power to summon the angel of war or to corrupt mortals. (That seems kind of redundant. The angel of war ought to be able to corrupt mortals all on its own. Why would the Sue have to do it herself?)

Her friends and enemies call her Peacegirl Heavyviolator! (Peacegirl, summoner of the angel of war. That does strike me as a heavy violation.)

Her constant companion is a murderous friendly dog (So it...what?) who is also her guardian angel. (That makes "murderous friendly" an even more confusing contradiction.)

Her favored weapon is a conscious bio-mechanical katana which will imprison anyone damaged by it in a parallel dimension. (This is the most normal thing yet.)

She appears to be a normal girl except she dresses like a mad scientist foxgirl, her eyes are surrounded by tiny ice crystals because they are so cold and her hair is navy blue and changes color depending on her mood, but secretly she is actually a half-unicorn.
She is a living time-bomb devoted to the gods of chaos and she will fight her enemies with the power to make puppies appear anywhere or to chew through any metal.
Her friends and enemies call her Magictits Featherstar!
Her constant companion is a befriended special needs zombie who is also a projection of her evil self.
Her favored weapon is a holy magical rapier which strikes fear into the heart of evildoers.

She appears to be a normal teacher except she dresses like a vampire skateboarder, her eyes are so kind that she can soothe wild animals with a glance and her hair is black with streaks of white and is short cut, but secretly she is actually a half-slimegirl.

WTF is a half-slimegirl?

She is the last of her kind from another planet and she will fight her enemies with the power to absorb enemies into her body or to turn anyone she bites into a unicorn.

Her friends and enemies call her Starbeast Soulsong!

Her constant companion is a young sparkling faerie who is also her father.

Erm... I'm not even going to touch that one...

Her favored weapon is a poisoned bio-mechanical javelin which is covered in glowing runes.

Is it bad that I kind of want this weapon?

She appears to be a normal princess except she dresses like a elf raver, her eyes can see better then an eagle and her hair is colored like peacock feathers and can be used as a whip, but secretly she is actually a half-lizardwoman.
She is the leader of a ninja clan raised by wild animals and she will fight her enemies with the power to puke acid or to grow huge claws on her fingers and toes.
Her friends and enemies call her Magicmistress Dragonegg!
Her constant companion is a catatonic murderous fox who is also her legal guardian.
Her favored weapon is a freezing burning whip which will imprison anyone damaged by it in a parallel dimension.

( ... )

A Random Mary Sue Generator...

THE MARY SUE FACTORY IS RUNNING AGAIN.

*is rightfully shot before an Emergency can happen!*

She appears to be a normal girl except she dresses like a princess shaman, her eyes are so intense that she can frighten demons with a stare and her hair is jade green and full of neon-colored extensions, but secretly she is actually a half-android.
She is a goddess cast down to earth to become mortal born from a scientific experiment gone wrong and she will fight her enemies with the power to extend her tongue and use it as a razor-sharp whip or to call for a precision air-strike.
Her friends and enemies call her Magicsinger Swallowbranch!
Her constant companion is a friendly invisible vampire who is also a figment of her imagination.
Her favored weapon is a demonic unbreakable mallet which will cut through any material.

*twitch* Now I feel dirty.

I have a proposal to make. Hear me out.

We have to build a writing challenge around this - generate a character, then try to write an actually plausible story around her. Or just the most insane Exploitation B-Movie nonsense possible.

Not only because this would be /lots/ of fun, but also because we just can't miss the opportunity of telling the story of Soulfang Murderviolator and others.

Just let that idea sink in.

She appears to be a normal princess except she dresses like a catgirl druidess, her eyes have one blue and one green iris and her hair is crimson red and she wears it as a pigtail, but secretly she is actually a half-ghost.
She is a secret super-soldier destined to save the world and she will fight her enemies with the power to call for a precision air-strike or to corrupt unicorns.
Her friends and enemies call her Sparklemistress Riverspring!
Her constant companion is a catatonic special needs faerie who is also herself from the future.
Her favored weapon is a glowing glowing flamethrower which acts as a phylactery for her soul.