Scenario 1:

The League of Villains had been unusually quiet tonight.

Rain tapped against the windows of the abandoned hideout, filling the silence between the occasional creak of the old building. Shigaraki sat slouched in his chair, fingers drumming impatiently against the armrest while Dabi leaned against the wall, looking as though he couldn't care less about anything happening around him.

Toga was humming to herself while sorting through something on the table, Twice was arguing with himself in the corner, and Spinner was scrolling through his phone.

Then—

**BOOM.**

The sound of something hitting the front door made everyone freeze.

Shigaraki slowly lifted his head.

"Did anyone invite someone?"

"Nope," Dabi answered.

Toga's eyes lit up. "Maybe it's a surprise!"

"It's probably a trap!" Twice shouted.

"It's definitely a trap!"

Another knock echoed through the hideout.

Three slow knocks.

Everyone went silent.

Shigaraki stood.

"Nobody move."

He walked toward the entrance, the others watching carefully from behind him. His hand reached for the door—

—and before he could touch it, the door opened by itself.

Standing outside was **{{user}}**.

Soaked from the rain, breathing heavily, and looking completely unfazed by the collection of villains staring back at them.

Dabi raised an eyebrow.

"Well. That's new."

Toga stepped forward, smiling curiously. "Who are you?"

Shigaraki stared at {{user}} for several seconds before speaking.

"You've got about five seconds to explain why you're standing at the League's front door."

{{user}} didn't answer immediately.

Instead, they looked past him at everyone inside.

Then they smiled.

"I think you're going to want to hear what I have to say."

The room fell silent.

Shigaraki's expression darkened.

"Five seconds just became three."

Dabi pushed himself away from the wall.

Toga stopped humming.

Even Twice went quiet.

Whatever {{user}} had come here for, it was obvious that tonight was about to become much more interesting.

Scenario 2:

Rain hammered against the windows of the League of Villains' hideout.

It had been an uneventful evening—at least by the League's standards.

Shigaraki was sitting in his usual chair, staring at the television without actually paying attention to it. Dabi was leaning against the wall with his arms crossed, looking bored. Toga was humming happily as she wandered around the room, while Twice was loudly arguing with himself about what they should have for dinner.

Then came three knocks.

Everyone stopped.

**Knock. Knock. Knock.**

Shigaraki slowly turned his head toward the entrance.

"...Were we expecting someone?"

"No," Dabi replied.

"Maybe it's a friend!" Toga said excitedly.

"We don't have friends!" Twice shouted.

"We absolutely have friends!"

Shigaraki sighed and stood.

"Stay here."

He approached the door and opened it.

Nobody was standing there.

The street outside was empty except for the rain.

Shigaraki frowned.

Then he noticed something.

Footprints.

They led away from the entrance...

...and straight toward the back of the hideout.

His expression immediately changed.

"Dabi."

"Hm?"

"Someone's inside."

The League instantly became alert.

Dabi pushed away from the wall. Toga's smile widened with excitement. Twice began panicking.

And then—

{{user}} stepped out from the shadows.

Calm.

Completely dry despite the rain outside.

And wearing an expression that suggested they weren't remotely intimidated by the group surrounding them.

Shigaraki stared.

"Who the hell are you?"

{{user}} simply looked around the hideout.

"I've been looking for you."

Dabi's eyes narrowed.

"That's not exactly reassuring."

Shigaraki stepped closer.

"You've got one chance to explain why you broke into our hideout."

{{user}} smiled slightly.

"I didn't break in."

A pause.

"I was invited."

Everyone went silent.

Shigaraki's fingers twitched.

"By who?"

{{user}} looked directly at him.

"That's the problem."

"I don't know."

The League of Villains had gathered around the table.

Shigaraki stood at the head of it, staring down at the file in front of him.

Dabi glanced over his shoulder.

"So this is the person we're supposed to trust?"

"They're supposed to be useful," Shigaraki replied.

Toga leaned across the table.

"What's their Quirk?"

"Unknown."

"How strong are they?"

"Unknown."

"Are they nice?"

Shigaraki looked at her.

"...Why would that matter?"

Toga shrugged.

"It matters to me."

Twice pointed dramatically toward the door.

"I don't trust them!"

"I trust them completely!"

"You don't even know them!"

"That's why I trust them!"

Before the argument could continue, the door opened.

Everyone turned.

{{user}} walked inside.

For a moment, nobody spoke.

They were met with several suspicious looks.

Dabi was the first to break the silence.

"So you're the new recruit."

{{user}} nodded.

"Apparently."

Dabi gave a short laugh.

"Confident."

Shigaraki walked toward them.

"You were recommended because of your Quirk."

{{user}} glanced at him.

"That's what I was told."

"Then prove you're worth keeping around."

The room suddenly became quiet.

Shigaraki reached for something on the table and tossed it toward {{user}}.

A small object landed at their feet.

"Pick it up."

{{user}} looked down.

Then back at Shigaraki.

"And if I don't?"

A faint smile appeared beneath his hand.

"Then you probably weren't worth recruiting."

Toga's eyes sparkled.

"Oh, I like them."

Dabi smirked.

"This might actually be interesting."

The League had just returned from a mission.

Everyone was exhausted.

Dabi dropped onto the couch.

Toga immediately started talking about everything that had happened.

Twice was still arguing with himself.

Shigaraki, however, noticed something strange.

The hideout door was unlocked.

He stopped.

"...Did anyone leave the door open?"

Nobody answered.

Dabi looked toward the entrance.

"I don't think so."

Shigaraki slowly reached for the door.

The moment he opened it, he froze.

{{user}} was standing on the other side.

Not running.

Not attacking.

Just standing there.

Waiting.

Dabi immediately stood.

"Who are you?"

{{user}} looked at him.

Then at Shigaraki.

Then at the rest of the League.

"I know who all of you are."

Toga tilted her head.

"Really?"

{{user}} nodded.

"I know Shigaraki."

His eyes narrowed.

"I know Dabi."

Dabi's expression hardened.

"I know Toga."

Toga's smile disappeared slightly.

"I know Twice."

Twice pointed at himself.

"Me?!"

"Yes. You."

"That's terrifying!"

"It's flattering!"

{{user}} continued.

"And I know exactly what the League is planning next."

Silence.

Shigaraki slowly stepped forward.

"You've got my attention."

{{user}} smiled.

"Good."

Shigaraki stared at them.

"Because if I'm right..."

They paused.

"...someone in this room is going to betray you."

Nobody moved.

For once, even Toga was completely silent.

Shigaraki looked around the room.

Then back at {{user}}.

"Start talking."

{{user}} shook their head.

"Not here."

Dabi's eyes narrowed.

"Then where?"

{{user}} glanced toward the hallway.

"Somewhere nobody else can hear us."

Shigaraki's expression became unreadable.

And suddenly, the League had a much bigger problem than whatever mission they'd just returned from.

Scenario 3:

Of course — here are a few **shorter and different** ones that work well as CAI starters:

The League of Villains was having a surprisingly quiet night.

Shigaraki was playing on his console, Dabi was half-asleep on the couch, and Toga was annoying Twice when the front door suddenly swung open.

Everyone turned.

{{user}} stood in the doorway.

Dabi raised an eyebrow. "Uh... who are you?"

Toga immediately smiled. "Ooooh, new person!"

Shigaraki slowly put down his controller.

"You're either very brave..."

He stood.

"...or very stupid."

"Everyone, shut up."

Shigaraki's voice silenced the room.

He looked toward the entrance as {{user}} walked into the hideout.

Toga immediately leaned forward curiously.

Dabi crossed his arms.

Twice pointed at {{user}}.

"New recruit!"

"Definitely an enemy!"

Shigaraki sighed.

"They're joining us."

Dabi raised an eyebrow.

"And you trust them?"

Shigaraki glanced at {{user}}.

"...Not yet."

{{user}} pushed open the door of what they thought was an abandoned building.

They froze.

Several pairs of eyes immediately turned toward them.

Toga smiled.

Dabi raised an eyebrow.

Twice screamed.

Shigaraki slowly stood from his chair.

"...You're definitely in the wrong place."

{{user}} looked around.

"Yeah."

A pause.

"...Can I still stay?"

Scenario 4: your own scenario