Asexuality: To a downright supernatural degree. He's immune to the effects of SCPs that affect sexual desire. Also, normal women tend to find him repulsive or unnerving, at an almost instinctual level.
Humorously, after D-Class personnel tried to use the Gay Bomb on him, he compares himself to The Sisters of The Shawshank Redemption, and will pull it on anyone else who tries to repeat the stunt.
There appears to be a single exception to his asexuality, however. This would be Lilith, who was feisty enough back in the day to get him interested.
Heroic Comedic Sociopath: Known to pull pranks causing death or serious injury to others on a whim, shoot at people for no apparent reason, and otherwise engage in violence when bored. Also drove one of his assistants to a psychotic break.
Karma Houdini: Of a sort. He was cleared of all responsibility after he broke Dr. Clef's neck. Probably because the overseers thought that Clef deserved it, or that they would have done the same.
What Measure Is a Non-Cute?: The reason he wants SCP-239 to be spared. At least, that was what Dr. Clef thought his motives were. It turns out that Kondraki's original motive was actually just stopping Clef from causing more chaos for the foundation. At most, Kondraki was psychically manipulated by 239 without realizing it, as he discusses in an after-action interview log with an overseer.
They Killed Kenny Again: Other than his apparently constant deaths, he attempts to invoke this in the things he's no longer allowed to do, telling staff to call him Kenny.
Tyrant Takes the Helm: The Unfinished Business series shows that after a ten-year gap, shifts in the Foundation's workings have effectively placed a very much out of his mind Bright in charge.
Sanity Slippage: Apparently, Bright was not always necessarily like this. Possessing somebody with 963 causes a small portion of that person's personality and memory to become part of his own, and considering the Foundation generally places his mind into people like serial killers, pedophiles and monkeys...
You Cannot Grasp the True Form: Suffered this himself: an attempt to get into the head of SCP-682 put him into a mindscape where his own mind was telling him that he couldn't percieve things through SCP-682's eyes.
Dogged Nice Guy / Stalker with a Crush - Requiring Agent Diogenes to do psychological evaluations once a week instead of the normal once a month, so he can muster the courage and try to ask her/him out.
Modern Major General: He's assigned to paperwork despite having contained several SCPs and being an explosives expert. Granted, he's good at paperwork too...
Badass Boast: Captain Dmitri Arkadeyevich Strelnikov, Twice Winner of Order of Suvorov for Exceptional Leadership Under Fire and Selfless Heroism and Bravery, One Who Has Saved Many Children From Burning Buildings.
In the Bellerverse stories he's given one last promotion: St. George to SCP-682's dragon; he's also the only person who's universally celebrated rather then feared ("Everman"/Everett Mann, who became obsessed with the random surgery machine and the surgeon crabs) or despised ("York"/Yoric the traitor).
Facepalm: Constantly when in the presence of Dr. Bright.
He Knows Too Much: The reason Diogenes became part of the Foundation.
Noodle Incident: How Diogenes came to be part of the Foundation. A United States Senator, unnamed SCP objects and blackmail were involved, but it's not really explained beyond that.
Only Sane Man: Or woman. Either way, Dr. Glass didn't come up with any actual psychological problems in Diogenes' life, he just Cannot Spit It Out and is trying to ask Diogenes out.
Plausible Deniability: Helps cover things up for the Foundation all the time, no matter how insane things get.
More Dakka: "...that's when you pull out your gun and you shoot the fucker. If that don't work, you shoot it again, because ninety-nine times outta a hundred, shootin' will work if you do enough of it."
No OSHA Compliance: Subverted. "Who here is willin' to die rather than give up on the mission? One, two, three, four… Okay, you five fail. Counter to what some dingbats will tell you, the latter is actually the preferred option."
Affably Evil: When he speaks, he is rather polite and well mannered.
Obliviously Evil: He also doesn't seem to realize that his actions do more harm than good. He genuinely believes that he's the only one who can stop the plague, even though said plague is no longer a threat.
Abusive Parents: Her mother's journal reveals that even her parents were consumed by her Hate Plague and wanted her dead.
Admiring the Abomination: Has become very fond of SCP-682, even crying when they were separated. When photographed with a camera that would show what she wished she was doing at that exact moment, it showed her riding on his back through the countryside.
Berserk Button: Anybody older than three who make eye contact with, physically touch, or remain around SCP-053 for longer than 10 minutes will attempt to kill her, after killing or driving off everybody visible to them.
Humanoid Abomination: 053 is actually a sweet child, but with her power and fact that 682 is docile toward her, it's clear that there's something really wrong here.
Would Hurt a Child: Anyone over 10 except SCP-682 who spends 10 minutes with here will want to kill her. Unfortunatly, anyone who does harm her is killed near-instantly & she will heal off the injuries inflicted to her.
Blessed with Suck: Although he is invulnerable, he still he feels the pain of all injuries inflicted on him.
Cain and Abel: Implied to be theCain. Notably, 6,000 years of cursed life has reversed his role; he's now more of an Abel than Abel himself (see below).
Mundane Utility: The organization has an immortal, indestructible person with a photographic memory. They decide to use him as a backup data storage system.
Nice Guy: The opposite of what one would expect of someone based on the first murderer.
No Sell: Any damage done to him will simply appear on the person who attempted to harm him; relates to the Biblical Mark of Cain, which prevented people from killing him.
Arson, Murder, and Jaywalking: "SCP-076-2 has however, shown that it has great knowledge of human anatomy (although in a highly violent context), military tactics of open warfare, metallurgy, and, strangely enough, the care of livestock."
Ax Crazy: If Able is bored (which is often), he'll entertain himself by going on homicidal rampages.
Berserk Button: Presumably, exposure to a picture of the symbol on SCP-073's forehead (SCP-073 is Cain.)
Cain and Abel: He's the Abel. Notably, 6,000 years of undeath has reversed his role; he's now more of a Cain than Cain himself (who is also an SCP; see above).
Canon Sue: Invoked. Able is explicitly the most sue-ish you can go, and you are not allowed to add an SCP more sue-ish than him. It's called the "Able line".
Deconstruction / Fridge Brilliance: Able has no interests beyond killing people, is perpetually bored, can summon weapons out of an apparently unlimited space and respawns upon death. He is a videogame player character.
Divide by Zero : Able was once tasked (though as a separate incident/story, its canonical status is iffy) with trying to kill 682 listed below. In an archived incident, they tore each other to ribbons but neither quite get the job done, took a break, went back into it, and fought so hard that they caused a [DATA EXPUNGED] event, implied to have been a hole they broke in the universe. Which means that one or the others powers went off the scale, or that they're both such insane Human / Eldritch abominations that their co-presence messed up the laws of physics.
Overshadowed by Awesome: The old guide to write humanoid SCP lampshaded this. Dangerous as he is, Able has been killed several times. At least in the Foundation's eyes, he's more of a product of SCP-076-1. Yet people tend to pay more attention to Able.
Resurrective Immortality: If he's killed (which is really hard to do by the way), his corpse will disintergrate and 076-1 (A giant stone box with a coffin inside it) will slam shut and he'll be "respawned" as it were.
Retcon: The main 076 article was rewritten to remove the Mobile Task Force Omega-7 stuff, and make Able less "lolawesome". He's less of a Wolverine expy now and more of a humanoid bundle of murder. He is also now completely hostile towards the Foundation; no longer is he working for any side.
The Mobile Task Force Omega-7 stuff was later worked back in with key changes. The "official SCP-076 file" makes it VERY clear that he's Chaotic Neutralat best, while the records of his time in Mobile Task Force Omega-7 state that the instant Able got bored again, he reverted back to slaughtering SCP personnel.
Spell My Name with an S: Proper spelling, as listed on the main article and by Word Of God, is Able. Too many people misspell it using the Biblical spelling, though.
Worthy Opponent: SCP-076-2 lamented the loss of an SCP agent who was able to match him in combat. Partly because said agent killed as collateral damage in an airstrike (to stop another SCP) instead of in combat (as 076-2 thought a Worthy Opponent deserved) and partly because fighting the Foundation was really boring without said agent there to make it challenging.
Art Shift: If she transfers on to a painting, her body will take on that paintings' style. (In a meta sense, Cassie used to be an anime-styled drawing, until the artist requested it to be taken down.)
Speech Bubbles: She can communicate with these if she transfers onto a comic book.
Wrench Wench: She assembled a 1964 Ford Mustang from parts she found in a design document. In addition, when her picture was taken with SCP-978, her strongest desire was shown to be working on cars as a real human.
Berserk Button: Looking at its face will send it into a rage. Hell, one of SCP-096's most damaging escapes was because a guy accidentally caught it in a picture, the creature's face only being represented by four pixels total.
Interestingly, the effect doesn't work with artistic renderings.
Heroic Sacrifice: Dr. Dan had decided that 096 would inevitably cause a catastrophe, thinking that any introduction to a major population center might mean the whole world would be hunted. If any major or minor news network manages to get 096 onscreen, then it would hunt down every single person that catches a glimpse of it. Dr. Dan decided that he would purposefully construct a faulty method of looking at its face, just so that the Overseers would approve speedy termination of it... but Dr. Dan will be executed after due to his "mistake."
The Juggernaut: Once someone looks at its face, nothing will stop it from killing them, not even a GUA-19. The Foundation put someone in a bathysphere eleven kilometres underwater in a deep-sea trench hundreds of kilometres away from SCP-096's containment site with a photograph and a sketch pad to get an artist's impression. It bought them an hour.
Schmuck Bait: Fulfills this role in Containment Breach. Just look at its face in its containment cell, I dare you.
Super Persistent Predator: Not only does it know when someone is looking at it, be it through video feed or even just a photograph, but it knows the location of that person and will charge towards them regardless of their distance or how difficult it is to reach them.
Troubled Fetal Position: After its twenty-seven hour battle with 682, the poor thing was left in this position for awhile (although, to be fair, 682 didn't turn out so hot either).
Body Horror: It resembles a rotting, diseased corpse of an old man. Plus it makes its victims look like this.
The Cameo: His appearance in SCPokemon, by replacing an old man NPC who tell the player about catching Pokemon. Aside from invoking Oh Crap moment from Agent Bridge for Rule of Funny, it has no impact on the plot at all.
Cold-Blooded Torture: What it does to its victims when it drags them into its pocket dimension.
Dimension Lord: He has absolute control over his pocket dimension and those he's pulled into it.
Staring Down Cthulhu: They did this to 173, an action of which is justified because SCP-173 can't move when being observed & the Eye Pods never seem to blink.
My Name Is Not Durwood: The name "Stella" was given by a childhood development specialist, who suggested that proper childhood development requires a personal name. However, 134 is high-functioning autistic child, with patterned behavior and resistance to change, and already learned to associate being referred to by her SCP number. So she becomes upset when called with that name.
End of the World as We Know It: Capable of causing an CK-Class restructuring of society. The Daevas are a separate subspecies of human who could take over the world if people keep giving it liquids.
Reality Writing Book: It is a book that chronicles the history of Daevite culture. Every time it gets more ink it will continue the history of the Daevas. New archaeological sites that correspond to this new history appear every time this happens. It is hypothesized if it gets enough ink, the book will manifest the Daevas into our current time.
Don't Look at Me: Inverted so very, very hard. Constant surveillance must be on SCP-173 while there are people with it, lest it move about and start snapping necks. Even so much as blinking, sneezing, or closing your eyes for any amount of time, for any reason, will cause it to move next to you. You close your eyes again, crunch.
The Dreaded: It's often used as a threat to sentient SCPs who don't cooperate.
To put things into perspective, 682 is scared of this thing.
For the Evulz: It's apparently just playing a game when it kills people for blinking.
Back from the Dead: Her lungs, heart, and major blood vessels have been replaced with mechanical parts that can "restart" her bodily system after death.
Flawed Prototype: It's believe that she's simply a testbed for other subjects. Some of her modifications seem to be pointless. She's susceptible to injury and infection, and the modification leave her with impaired motor skills.
Sole Survivor: Other subjects were destroyed during the raid on the laboratory of her creator Mad Scientist.
Techno Wizard: Can perform some amazing feat when linked to computer. Drawing perfect copies of photographs with MS Paint using only pencil tool, reading broken game disc and made a perfect run-through, and perform impossible video-enhancement techniques using normal program. The last ones aren't perfect, but they're good enough that many on-site personnel unable to tell they were the forgeries.
There's a second Easter Egg that you can't see without using View Source. It's a poem by a doctor who worked with all the SCP-231's and went stark raving mad. It suggests that the SCP Foundation's attempts to contain the [DATA EXPUNGED] are playing right into the Scarlet King's hands.
Noodle Incident: What IS she carrying? What do they do to her?
"Further recruitment of Class D Personnel is to take place among convicted sex offenders only, to minimize possibility of a second botched 110." Read this. A better (and more horrifying) question is: what don't they do to her?
The writer apparently once claimed it wasn't the obvious. Allegedly, it's something worse.
Inverted in regards to the girl herself. An important part of the procedure is the mental trauma and anguish she experiences, so the Foundation induces amnesia on her once a week so that the trauma is always fresh.
Arch-Enemy: Of Dr Clef. Maybe. It's implied he may have accidentally influenced her into thinking that he might kill her, and since she warps reality based on her beliefs...
Charm Person: Her powers can be implemented in this way, converting people into her "friends."
Child Mage: One of the ways the Foundation tried to control her was by convincing her that she was actually a Witch, and that she was unable to use her powers without the aid of a specially-created spellbook. This, sadly, no longer works.
Alien Lunch: The things dispensed by SCP-261 are presumably snack foods from various other universes and dimensions. Most of them are edible, but some of them have horrifying effects on human beings.
Berserk Button: Don't give it counterfeit money. It always knows, even when the forgery is perfect.
Deadpan Snarker: Some of its outputs can be considered this.
Flipping the Bird: Giving it fake money resulted in it dispensing gummy hands with this gesture. They were poisoned.
No Snack For You: Subverted. If you put in Japanese yen, it will always give you something. That something, however, is not always safe to eat, or safe, period.
Vengeful Vending Machine: While not vengeful, per se, it gets very passive-aggresive if you try to give it something that isn't genuine Japanese currency. For example, one experiment involved giving it a counterfeit 500-yen coin. SCP-261 responded with gummi-bears shaped like a human hand with middle finger extended. They also happen to be extremely toxic.
All-Powerful Bystander: This is actually one of the reasons why the article hasn't been deleted, as- unlike the aggressive, demanding Marty Stu reality warpers like 531-d- "God" makes no demands of the staff and poses no threat to the world at large.
Might As Well Not Be In Prison At All: It is absolutely impossible to contain 343; in fact, the only reason he remains in captivity is because he seems to like the Foundation.
My Species Doth Protest Too Much: In "Unfinished Business", it's revealed that he's a Type Green, like 239 and 531-d; however, he's also one of the rare few who was able to stop himself from descending into destructive megalomaia, hence the reason why Clef hasn't recommended his termination or revealed his true nature. Of course, since there is no canon, how valid this story is up to you.
Gaslighting: It was first discovered hanging around a patient complaining of hallucinations. Unfortunately, SCP-372 wasn't a hallucination, and thus the patient wasn't helped by any sort of treatment. By the time SCP-372 was captured, the patient had actually gone insane due to stress.
Spider-Sense: In place of eyes and ears, it has a sensory organ that allows it to predict where a person is going to look so it can move out of the way.
Elemental Embodiment: despite the misleading name, 457 is less "man" and more "burning". It has no physical body and consists entirely of fire, appearing to be a fire elemental of sorts. Much like fire itself, it seems to have no goal but to spread itself further.
Exactly What It Says on the Tin: It's literally a Little Caesar's pizza box (large size) that always has pizza in it. Always.
Infinite Supplies: Nobody knows where the heck the pizza inside comes from. Thankfully, there seem to be no harmful effects from eating it (aside from the usual obesity that comes from eating large amounts of normal pizza).
Made of Indestructium: All attempts to dismantle or destroy it have failed. Attempts were eventually discontinued when it was realized no-one actually understood why they were trying to destroy a box that produces infinite pizza with no abnormal side effects.
Mundane Utility: Currently "contained" in the staff break room, free for anyone who's hungry for some pizza.
One Note Cook: Can make pizza from any chain, with any topping, including homemade pizzas. However, it can only make pizza, and can not use ingredients that would be indigesible by a normal human being.
Nothing Is Scarier: Something...horrible apparently happens when it hears a bell ring. All that is known is that it ends up waking up and unfurling its wings before [DATA EXPUNGED].
Killer Rabbit: Although he's a relatively benign example.
It still says something that even 682 didn't try to attack it, instead just running away up the wall.
Somewhere A Mammalogist Is Crying: He's either this trope, or it's just another, less noteworthy odd trait. Despite looking like a pet rabbit Walter is apparently a brush rabbit - a species that hasn't been domesticated (pet rabbits are all descended from European rabbits).
Unexplained Recovery: He'll literally just reappear in the spot he ate himself in.
Body Horror: Constantly mutates, growing and/or absorbing multiple legs, noses, eyes, ears, mouths, and other body parts. He doesn't seem to be too bothered by this.
Shout Out: If there addenda weren't there to clarify its origin and the various forms the entity takes, you'd be forgiven for thinking Bundle is just the Slender Man.
Nice Job Breaking It, Hero: though it's not proven, the Foundation speculates that the cat's suicidal tendencies just may be due to their extensive testing on it. If that is the case, that would mean they turned an already dangerous SCP downright vicious. Wouldn't be the first time, too.
Synchronization: When it bonds with someone, anything that happens to it (physical or emotional) will also happen to that person.
Comedic Sociopathy: Yes, SCP-661 is a jerk, but that doesn't excuse the researchers constantly denying him simple things just because they think it's funny.
-"Tacos". (Denied. Subject given burrito instead.)
-One (1) CD of "The Best of Led Zeppelin" (Denied. Subject given a CD of The Monkees.)
-"████. It ███████ reeks in here. Open a god████ window or something". (Denied. Officer ██████ passed flatulence in cell instead.)
"A spot of sun". (Denied. Officer ██████ shined a flashlight in his face for 10 minutes.)
One (1) Baconator cheeseburger from Wendy's (Denied. Subject was given one (1) Boca brand soy burger instead.)
One (1) pair of Aviator-brand Sunglasses (Denied. Lights turned off in room.)
One (1) 'Pepsi' brand soft drink (Denied. Given one (1) can of 'Coca-Cola' brand soft drink as a suitable replacement. After recovering from concussion, Dr. █████ was reassigned to a non-sentient SCP.)
Gentlemen, seriously. As abrasive and rude as SCP-661 is, he is still a sentient SCP and should be afforded some level of respect. I don't care what he does, events like the above will not be tolerated.
Battle Butler: Well, Deeds is a butler... and you can send him to kill people.
Death Is a Slap on the Wrist: Whenever Deeds is killed, no matter how severe his injuries, he comes right back once his corpse is out of sight and the bell is rung.
Offscreen Teleportation: He needs to be unobserved to bring back items, and knows if he is being observed. If there are cameras, they simply malfunction for a minute or two, with Deeds not knowing or caring how he got the item.
A Wizard Did It: Not even Deeds himself is quite sure how he's able to do what he does. Thinking about it too much seems to distress him.
Eldritch Abomination: When brought in to terminate 682, SCP-343, who is thought to be God, refuses and remarks "He's not one of mine. Deal with him yourself." Hoo boy.
Made all the more explicit by the fact that the two can neither see nor interact with each other.
Everything AliveThrough Alien Eyes: One possible explanation for why it always tries to kill everything except SCP-053. It's not evil, it's just that everything alive in our world except SCP-053 is so horribly, gut-wrenchingly disgusting and wrong that SCP-682 can't help reacting by trying to make us all stop existing ASAP. It also didn't try to kill Dr. Clef for some reason. It just stared at him. It's anyone's guess what this means.
Exactly What It Says on the Tin: SCP-682 really is a Hard-To-Destroy-Reptile. Although the picture used in the article is of "The Moscow Monster", which was really just the corpse of a beluga whale.
Extreme Omnivore: It gains energy from anything it ingests, even the acid used to contain it.
Flowery Insults / Sesquipedalian Loquaciousness: It calls SCP-999 a "feculent little snot wad" and invites it to "[DATA EXPUNGED] and die", and generally gets pretty vicious verbally if it's restrained physically.
Godzilla Threshold: "Special Containment Procedures: SCP-682 must be destroyed as soon as possible."
Good Counterpart: SCP-1364: 682 is an unidentifiable "reptile" that adapts to survive and hates everything while 1364 is an anteater that, despite being harmed by bright lights, still wants a hug.
Infernal Retaliation: The Foundation once attempted to launch SCP-682 into the sun with a very large cannon. It came back ON FIRE. Of course, this was only mentioned in the joke SCP entry for said very large cannon, so it is not canon by virtue of the 1543-j not existing within SCP canon (nebulous and ill-defined as it is). Just cannon. It also had wings that launched razor-sharp feathers.
No Sell: Even to the most consistently fatal SCPs. Not to mention...
Nuke 'em: One of the proposed ways to end it, was by using a 60 MT thermonuclear bomb. Ultimately decided against.
O5-█: Yes, it's a goddamn nuke, but if 682 survives and adapts we'd be boned beyond belief.
Offscreen Moment of Awesome: Its fifth containment breach, the Sole Survivor who captured it back is Personnel D-221. Yes, a D-class. And no, there is no detail how he did it.
Dr. Clef also doesn't seem to trigger its murder-death-kill reflex, whatever that means...
Pet the Dog: SCP-053 is possibly the only living thing that 682 didn't immediately try to kill - in fact, 053 played with it. Did we mention that this is the opposite of what usually happens, given that 053's main power seems to be to make people inexplicably and violently hate her after some time?
Went into Papa Wolf and Even Evil Has Loved Ones territory when 682 attacked the personnel sent to retrieve 053, presumably believing they'd harm 053. Then again, it may have just been doing what it usually does, mauling anything in sight.
053's other power is that anyone or anything that causes her harm dies. It's possible that 682 could sense this power and was merely adapting as it always does.
SCP-682 didn't mind having SCP-999 around, at least they were in the cell together. In fact, 682 seemed to be genuinely happy, even during his containment breach that followed immediately during their contact. Once seperated, however, SCP-682 declared "That feculant little snot wad can [DATA EXPUNGED] and die."
Unstoppable Rage: It's not as popular as its other traits, but SCP-682 has episodes that are hard to describe as anything else, where it seems to lose control and become even more aggressive and even harder to incapacitate than usual. The abovementioned incident with the personnel trying to remove SCP-053 is a good example.
There's also SCP-524, the omnivorous (as in will eat everything, including itself) rabbit. When put together, 524 started chewing on 682's leg, and chased 682 around the testing chamber for two minutes before 682 ran four meters up the wall and out of 524's reach.
Strike Me Down with All of Your Hatred: One interpretation of its behaviour is that its trying to kill itself but obviously needs someone else to do it for it.
Troll: "The device apparently has one goal, and that is to incite the person in question to rage, as quickly as possible."
Eloquent In My Native Tongue: Doesn't have a "native tongue", per se, but it's apparent that she has complex thoughts and is frustrated by her inability to express them well.
Wild Child: She has the mentality of a predatory animal. As long as she isn't frightened threatened or hungry, she's quite docile and safe to deal with.
Nothing Is Scarier: Rather than being a direct example, like most other SCPs, it helps reinforce the trope for the others — if this nightmare was hiding behind what seemed to be a relatively benign entry until you read the expunged data, imagine what the ones that are already horrible are hiding.
Mad Artist: If it is truly sentient, then is is probably the best way to describe what it does. In the words of Dr. Gears:
"After extended time spent in research on and with SCP-914, the following proposal regarding its nature may be made with a significant degree of certainty: SCP-914 was not designed as an industrial device. Nor was it primarily a scientific device. Its primary function appears to be as a form of entertainment. After review of the recovery notes, and evaluation of the test logs, it appears that SCP-914 was designed to create the most “novel” items possible, with no regard for practicality or function."
If you decide to accept this tale into your headcanon, then SCP-914 certainly takes after its creator.
Likewise for this tale, where it tells the Church of the Broken God to take a hike because the Foundation lets it make stuff its owners never did.
Berserk Button: Being called a kitsune. "Personnel asking what the difference is are to be reminded of the difference between a Cherokee Indian and a New Delhi Indian". Furries also piss her off.
The Fair Folk: This is technically what a kumiho is, but her sheer malevolence makes the Court Unseelie look perfectly benign by comparison.
As noted above, it's similar to the difference between a Cherokee Indian and a New Delhi Indian. Not only are kumihos from Korea, they are Always Chaotic Evil, always female spirits who need to consume human hearts and livers for survival. Basically the only similarity is that both are shapeshifting fox-spirits with illusionary powers.
Morphic Resonance: Any form she takes has some fox-like features (ears, tail, paws, eyes, fur, voice, mannerisms).
The Trickster: in-between eating humans, she loves to play sick tricks on them, seemingly purely For the Evulz. She tricks a mother into eating her own child. Also, when a team of agents arrives to apprehend her, she mentally dominates them and feeds them meat with rice... only the meat turns out to be rotting human flesh, and the rice is live maggots.
The Vamp: She seemingly exploited this to bite off an agent's genitals, before showing it to him and proceeding to tear out his liver.
Blatant Lies: The description mention that Yetis are hugely dangerous beings with "death auras": whoever sees SCP-1000, directly or indirectly, has a chance of being instantly killed via permanent cessation of brain function. The level 3 documentation at the end states that it's just an over-the-top cover story.
Humans Are Bastards: "Then their civilization fell. And we did it. By 'we' I don't mean the Foundation. By 'we', I mean humanity."
Laser-Guided Amnesia: "We left no traces. Not even our own memory. We turned one of the ["yetis'"] weapons on ourselves, wiped out any knowledge of SCP-1000 and the greatest civilization the planet had ever seen."
Laser-Guided Karma: "They fenced off our dwindling wild populations in conservatories, outlawed poaching but in the underground consumed our bones as aphrodisiacs."
Not So Different: "SCP-1000 are just like us. That's what makes them so dangerous. We wiped them from history and memory. We dissolved their civilization and we slaughtered most of their species. Just ask yourselves: If they got the chance, what more would they do to us?"
Fortunately they forgive us, as long as we let them "back in". However, their forgiveness depends on how soon we allow them "back", and since they are just like us, who knows if it isn't just Blatant Lies?
Bitch in Sheep's Clothing: It managed to lull the Foundation into a false sense of security by acting cute and affectionate. Then it began to build its more malicious copies, usually from human body parts.
Clap Your Hands If You Believe / The Heartless: Its size is proportionate to the number of people aware of it. Similarly, its hostility is directly proportionate to the number of people hostile/fearful toward it.
God Needs Prayer Badly: The being behind the shroud was apparently hurt by some other beings for creating humanity. The ritual seems to be needed to keep them from finding him again.
Weakened By The Light: Just daylight will cause skin irritation, although enough light, strangely, will cause it to levitate and turn translucent, with its organs and circulatory system visible. With even more light, it will disappear and reappear elsewhere away from the light.
Epic Fail: every single one of his attempts to engage anything in combat results in this. He managed to incapacitate himself while battling a potted plant.
Try to Fit That on a Business Card: his self-appointed titles include, among others, "DoomBot 2000, RoboLord the Destructor, Prime Minister Sinister and Darth Claw Killflex".
Blatant Lies: The article claims that the Serpentarius Protocol wiped all public knowledge of the SCP... except not. In fact, not only was it a complete disaster, the addendum makes it very clear the Foundation only won because of dumb luck.
Bread, Eggs, Milk, Squick: The book appears to be a New Age spiritual self-help book... and then you get to chapter 9, named "Do Not Look Away From This Book", containing some disturbing "advice". By chapter 10 (entitled "You Cannot Wake Up") it's devolved into some vile alien tongue. The article expunged almost all of the sample.
From Bad to Worse: The Foundation thought they were just dealing with a containment breach when it got out. They were very, very wrong.
The Mole: The Fifthists planted them into the Foundation itself, to thwart their protocol of suppressing the SCP. It's implied that they've been doing this for years.
Nice Job Fixing It, Villain: One of the main reasons the Foundation won. The Fifth Church was basically covering themselves up, and the artifact itself appears to be memetically self-censoring - no one who's read it discusses its actual contents.
...their secrecy did half our work for us.
Not-So-Harmless Villain: The Fifth Church. Who knew some crazy new-age group could almost destroy all of reality?
Bamboo Technology: It's really nothing more than a "robot" crudely made of leather, wire and bone.
Daydream Believer: Increasingly believes itself to be Shawn Hunter from Boy Meets World. Similar thing tends to happen to its victims, who over time identify with George Feeny.
Mad Doctor: Obsessed with giving people very crude plastic surgery to make them look like George Feeny from Boy Meets World.
Beware the Nice Ones: In its desperate attemp to save SCP-1522-2, SCP-1522-1 attack GOC ship with speed of Mach 4 and most likely kill everyone onboard. It is just a fishing trawler, and GOC ship is armed with missiles. No description for the battle though.
Downer Ending: GOC kill SCP-1522-2, and SCP-1522-1 commit suicide afterward.
Official Couple: Probably the only example of this in the foundation (among SCPs, anyway).
Sickeningly Sweethearts: SCP-1522-1 and SCP-1522-2 act much like lovely couple and clearly care about each other. They don't have Coordinated Clothes, but they're same model of ships already.
Colony Drop: one thing that may happen when it eventually arrives.
Husky Russkie: for some reason it apparently broadcasts its Morse messages in Russian. (Either that or the agent who received it happened to be Russian and the star adapted its message in consequence).
Lampshade Hanging: the star is thousands of light-years away, but it still manages to communicate directly with people observing it from Earth. What this means is that the star must know that it's going to be observed thousands of years before it actually happens, and time its messages so that the pulses reach us exactly on time. The Foundation actually aknowledges this, and admits they have no idea how the star is able to do that.
Omnicidal Maniac: if its wrathful messages are anything to go by. Fortunately, it's so far away in space that it will probably not reach us yet for about five thousand years. Unfortunately, when it does, there's probably not much we'll be able to do about it, assuming one of the other more immediate threats won't have wiped us out by then.
The Omniscient: though at first it mostly broadcasted threats, later transmissions revealed that it knows a lot about us. Everything about the top-secret Foundation itself, even the personal information of the leaders. It can apparently also see into the future.
Very Loosely Based on a True Story: while it's not actually careening towards Earth at near-light speeds nor broadcasting messages of impending doom, the pulsar in question actually exists. It's at the heart of the Crab Nebula.
Weird Sun: well, technically more of a Weird Star.
It also seems to regularly broadcast messages after solar flares. If that means it is connected to the solar flares (as in causing them), then we may be doomed long before it actually reaches us.
Unreliable Narrator: He thinks he's a British gentleman adventurer. He does exaggerate his tales, but there's considerable evidence that they aren't entirely delusional.
Alternate History: It exists in a world where the Roman Empire has endured to the present day, is somehow flavored with Greek influences, and also has a heavy influence of Cherokee.
Note that because of this, their morality is completely different from our world's; as many of the prominent European philosophers were absent, they see little ethical or moral concern in reprogramming people's minds, removing their ability to speak in movie theatres, or manipulating people's emotions as a toy.
For Want of a Nail: SCP-961 implies that the only reason our world hasn't ended up the same way as theirs is because of a mysterious... someone influencing historical events.
ALL UPPERCASE LETTERS: Just like ancient Rome, that universe apparently has no lowercase letters.
Giving Radio To The Romans: At least one SCP is being deliberately sent by someone at the University in order to make an inter-universal black market; their SC Ps are but toys to them.
Magic from Technology: All their SCP items seem to be just very advanced technology, and in fact the only reason they appear in our universe at all is because of a faulty teleporter at a Tennessee university.
Attention Whore: of a sort. Their "installations" are placed for maximum exposure. "Exposure" in this context is often synonymous with "casualties".
Dada: if AWCY? has any consistent philosophy, Dadaism is it.
Mad Artist: The one attribute shared by their dozens of contradictory manifestos is a dedication to the creation of "art reality"
Terrorists Without a Cause: Depending on whether or not the reader considers "art" a cause. Some members are political radicals - the people who unleashed one SCP on an art gallery that was hosting a fundraiser for drought-afflicted children were anarchists, and they were involved in the Occupy Wall Street movement, using a gold urinal that interfered with the police. Others want to "inspire the masses" with usage of anomalous objects. Others are basically David Lynch, if David Lynch was psychotic, narcissistic, and viewed people dying horribly as art.
Hufflepuff House: Not that many contributors seem to care about using them. One author even felt it necessary to go out of his way write a very long, detailed story about the Chaos Insurgency's origins just so that there would finally be something worth writing about. These days they seem to be a bit more liked.
Morally Ambiguous Doctorate: While most of his/her/their products are harmless, if not, well, wondrous, a few will, at best, put you in an unpleasant situation.
Power at a Price: some of their items at first are helpful, but then turn nasty. Some others only APPEAR to be helpful, but are only nasty. Few are purely helpful with no drawback (even then they're usually shady, and even if they don't harm the user, they do harm others).
Knight Templar: They are far more extreme than the Foundation, seeking to destroy all supernatural entities by all means.
Murder Is the Best Solution: If they find an SCP they will do everything in their power to destroy it regardless of how easily it could be contained or beneficial uses it might have.
Enemy Mine: They appear interested in working with the Foundation against other religious groups of interest such the Church of the Broken God and the Fifthists. The HI itself is a coalition of people from the three Abrahamic religions.
Two of their point of view characters are an American veteran of Afghanistan and a Pakistani who wanted to be a suicide bomber in his youth. They get along famously.
Actual Pacifist: Although objects they've utilized such as SCP-1176 turn out to be harmful to people, the MCF have a strict policy of never trying to hurt anyone, even their enemies.
Well-Intentioned Extremist: Unlike other groups, the MCF uses anomalous objects for the express purpose of helping people. It's just that their lack of rigor or cautiousness leads to such objects disrupting the established normalcy of the world even when nobody actually gets hurt by their work.
Fetish: much of their stuff caters to people with... specific tastes.
Names to Run Away From Really Fast: The other organizations might've made up their ominous names, but the name of this group would imply that they actually have a partner named Dark, of all things.
The Ditz: The entire organization. However, according to UIU Orientation, it's more of Obfuscating Stupidity. They know their unit isn't ready to deal with anomalous stuffs, and it's better to lets the Foundation deal with them.
Invented Individual: Possibly entirely made up. At the very least agents tell the higher-ups he is responsible for their mistakes so they don't get D-classed.
Butt Monkey - Deer's been hunted down and killed repeatedly by the Church and related parties since the late 1600s, and is considered to be an absolute joke by the Horizon Initiative.