There are already a few cows that claim to be plural, including ADF, Toren, Kevin Batman, Marigold Kilgour, Crystal Hall, and Awex. If you're acquainted with Tumblr culture, you may be familiar with kintypes and headmates. Lucky for us, there is an extensive community beyond these few exceptional cases, and the delusion runs deep. Before trying to decipher their incoherent ramblings, there are a few things worth pointing out.
(No, that tweet is not satirical. While this particular person isn't covered in the thread, you can find him here. He frequently gives public presentations on plurality acceptance.)
Many plurals will claim to be self-diagnosed with dissociative identity disorder (more commonly known as multiple personality disorder). They are probably full of shit. DID is an extremely rare condition, and it's typically found in children who have been subjected to severe, repeated abuse. Of course, many plurals will claim that they don't have a diagnosis because psychiatry is evil, and that anyone who questions self-diagnosed DID is also evil.
The concept of "otherkin" and "headmates" will sometimes seep in to the plurality community. The key distinction with plurals is that they genuinely believe they are sharing their mind and body with their various alters, whereas those who have kintypes or headmates typically describe it as some type of special, otherworldly bond to a certain character. That being said, a lot of plurals start out as otherkin and gradually begin to believe that their kintype is actually an alter.
You will quickly find that the plurals community is mostly made up of autistic, transgender males above the age of 18. Twitter is the primary gathering spot for plurals, who often create a separate account for each identity.
Notable Figures
Prominent, interesting, and otherwise exceptional members of the community.
Jakob Bing / Chessa Amanda Andreas Ennis Bing / Nyanby System
Alters: Scarlet / Erin / Kitten
Legal Name: Chessa Amanda Andreas Ennis Bing
Possible Birth Name: Jakob Bing
DOB: 10/09/1990
Location: Tyresö, Sweden
Amanda frequently posts about his interactions with his headmates. Since Amanda is asexual, he can only understand sexual behavior when Erin is in control. Erin likes to draw lesbian smut, and he has a tendency to act as a projection of Amanda's mommy issues obsess over breasts.
Before he realized that he was part-catgirl, Amanda went by Jakob Bing. At one point, Jakob was one of the top national Go players in Sweden, and he ranked highly in several renown tournaments. Currently, he lives in Sweden with his partner, Kai. Kai fully supports Amanda's delusions, and Amanda's various headmates all claim to have different relations with Kai.
Daniel Newell Knapp / Irene Ada Knapp / The Many Irenes
Alters: 23 separate Irenes
Legal Name: Irene Ada Knapp
Birth Name: Daniel Newell Knapp
DOB: 12/30/1980
Location: 1776 California St #5, Mountain View CA 94041
Phone: 408-412-4863
Occupation: Software Engineer at Google
Irene also believes in the concept of body age, and he will frequently refer to his actual age as his body age in order to clarify that his alters are not necessarily as old as him.
The plurals in this particular camp quite literally believe that age is a social construct, and that one's biological age is not necessarily a reflection of their identity.
Birth Name: Drake Austin Mayberry
Legal Name: Ace Jaycee Elizabeth Mayberry (yes, really)
DOB: 08/24/1998
Location: University Commons, 141 Piedmont Ave NE, Atlanta GA, 30303
Occupation: Student of the College of Arts and Sciences @ Georgia State University
Imagine if you took every horrible, embarrassing, batshit-insane Tumblr post that has ever existed, and then you used those posts to create an artificial intelligent bot. It would probably sound very, very similar to Ace Jaycee Elizabeth Mayberry.
Alexandra Shubina / Suncat System
Alters: Angel / Starlight / Butterfly / Lapis Lazuli / Fairy / Enby Guy / Sunshine / Zack / Jessica / Pearl / Yulya / Yana / Jack / Jasmine / Alice / Alexis / Kitty / Milk / Kerrie / Snow Leopard / Charlotte / Deer / Emily / Bubba / Fox / Lily / Phin / Core / Tony
Legal Name: Alexandra Shubina
DOB: 05/28/2000
Location: Obninsk, Russia
Occupation: Dropout from the Physical & Technical School in St. Petersburg, Russia
Alexandra does not have the same level of popularity as some of the other figures highlighted here, but she is noteworthy solely for the sheer amount of alters in her system. She claims to possess three separate "inner worlds," and each world contains different alters.
Other Members of the Community
Anyone claiming to be a plural is inherently pretty exceptional, but it would be too difficult to cover every single member of the community. Here are some others I've found.
One last thing: Yuge thank-yous to @zedkissed60, @Big Bad Brat, and @pyrrhic for help with the doxing work, to @Desire Lines for offering his Russian Troll expertise, to @Hellfire for being an excellent funny-content-finder, and to everyone in chat who's been subjected to tweets and selfies from the plural community over the past several weeks.
I had a lot of fun with this thread, and I would have had a lot less fun if I tried to do it by myself.