Warning; cringe because I had no idea how to start it. Also probably ooc

*Magical poof of sparkles and stuff*

"Hello people!"

The new crowd looked around in confusion and fear. Some even drew weapons

"Now now, let's not panic. I'm sure no one here has bad intentions yet"

"Yet?" someone asked

"Yes, yet. No one has had a chance to calm down and find anyone dangerous right?"

Some of the crowd nodded their heads in agreement. "Well now that that's settled, everyone find a spot to sit and i'll explain why you're here"

The group quickly dissipated as everyone found their friends. Or enemies, just anyone they knew in general.

"So.. where exactly are we?" a boy with a bowl cut asked

"That's classified. Actually, you'll find out eventually"
"When is 'eventually'?"

"Exactly what it sounds like. You'll know in due time"

"Stop trying to be mysterious you nerd! No ones gonna be scared of some 2 year old!" a spiky blonde mocked

"Agreed, that was cringe"

"You weren't supposed to agree"
"Kacchan, we just got here and you're already being rude?"

The blonde went silent.

"Um.. ok then. Anyways, I'll explain why you're all here! The purpose of this is to meet some new people. The catch is that you're all from different universes! You all should be with one or two other people. With these people, you will be doing a variety of activities like lessons, games, adventures, reactions, and more! None of them are mandatory, but it'll be more ente- FUN if you all participate"
"What was that you cut off?" a silver haired child asked

"Nothing, nothing, you heard nothing"

"Mhm, sure"

"Ehehe, well anyways i'll send you to your rooms now. If there are any questions or concerns tell them now or forever hold your peace"
'What is this, a wedding?' a golden eyed creature sweatdropped

"Nope, this most certainly isn't a wedding. I forgot to mention, any interesting or important thoughts can be heard by anyone I let. Make sure you don't spill any state secrets ;)"

"Did you just say an emoticon-"

"Yes I did. Is there a problem?"

"Nope. I just thought it was funny"

"Oo I see you have good taste. We will have to talk more later. For now, please ask actual questions"

"What happened to our homes? Like the worlds we live in?" the voice came from a boy dressed in red

"They are either paused or moving as normal. Nothing should be blown up or anything. As an explanation, each world has had some small disaster that somehow resulted in you all disappearing"

"Ah ok. Thank you for the info"

"You're very welcome. Any others?"

"Yeah, how can people from different worlds understand each other? Since we are all from alternate universes or whatever, shouldn't we speak different languages? What about different species?" a boy dressed in all blue asked. It wasn't just his clothes, his hair and eyes were blue too. Talk about bad colour choices. Not that blue is bad, it was just way overused

"I honestly don't know sorry"

"Oh.. that's ok I guess"
"Next"

"Me me! I want to ask a question!" a person with strange markings by his eyes said

"Sure. you don't have to ask if no one is speaking"

"Oops. um, could we do introductions or something? I feel like using descriptions of appearances might suck for someone who mainly uses names"

'My hearts been broke so many timessssssssssss'

"Yes you're right! From that side to that other side, go!"

"What are we even supposed to say?"

"Name and a bit about your worlds. One person can answer for everyone or you can share the responsibility"

"We will start. I am Ciel Phantomhive, head of the Phantomhives. This is my butler Sebastien, and another called Mey rin. It is a pleasure to meet you. My world is very average. Nothing special in the slightest"

"Oh god not another Lida.."

"Another who?"

"An annoyance from my school. Speaking of me, we will go next. I'm Katsuki Bakugou, it's terrible to make your acquaintance. The broccoli is Deku and pink cheeks is Uraraka"
"That's not a proper introduction! I'll fix it. Hello everyone! I'm Ochako Uraraka. These are my classmates, Izuku Midoriya and Katsuki Bakugou. We live in a world where 80% of the population has a superpower. These powers are called quirks, and they vary a lot. Some alter appearances, while others can affect objects. There are many other kinds but I wouldn't want to prolong this too much" she said with a bow

"I did the exact same thing!"

"I'll stop this before a fight breaks out. Can the next group go please?"

"Were next right? You should introduce us, Fushigiro"

"No way! You do it"
"You people sure are angry today.. Just play rock paper scissors or something"

Fushigiro and Itadori started playing a very aggressive game of rock paper scissors. Meanwhile, their teacher decides to be responsible.

"Sorry about them. The pink one is Itadori, the other one is Fushigiro, and I am Gojou. In our universe there are spirits called curses. Our job as jujustu sorcerers is to exorcise them!" he said overdramatically

"Question, how do you see with that thing on your eyes?"

"M a g i c"

"Um- ok then"

"Continuing on.."

"Hello. I'm Shigeo Kageyama. You can call me Mob. This is Hanazawa and Dimple. Me and Hanazawa are psychics. Dimple is a spirit" (I might be getting characters wrong sorry)
Poor choice of words. There were like at least 7 exorcists in the room.

"A spirit!? Why are you letting it roam!?"
"Dimple won't hurt anyone. He knows the consequences"
"No offense but you're really creepy"

"Look who's talking" Hanazawa teased

"I am not creepy! I am a cute ghost boi"

Again? These people never learn

"Well now is a good time to introduce ourselves! My name's Yashiro! This is Hanako kun and Kou Minamoto. Hanako is a supernatural, kinda like a ghost I think? But not quite. Kou is an exorcist"

"Why're they standing beside each other then??" a a teen with weirdly sharp teeth inquired

"Ask them. I don't understand all that stuff haha"
"Oh, alright! My turn now! I am Rin okumura. This is Bon and Shura!"

"Why'd you say your last name and not ours? Did you forget or something?"

"Nope i'm just better"

"Keep tellin' yourself that. We also come from a world of demons and stuff" Shura saud

Ok i'm just imagining how terrified or confused the infinity boys must be-

"And what do you do? Like are you regular citizens or what?"

"We're training to be exorcists. Except Shura, she graduated a long time ago. Probably. Hopefully"

"Cool. What do you use though? The only one with a physical weapon is the blue one"

(insert explanation here cause words are hard)

"I see. Thanks for answering"

And that's a wrap. Intros and conclusions are pain ;-; I hope you enjoyed it anyway! As usual, please tell me if you see any spelling or grammar mistakes ;) There will be two or three most intro chapters so I don't have to skip anyone