3rd POV:

While Stain was on his way to the LOV's hideout, he was thinking about what Siren has told him.

Stain: I am allowed to scare them, huh...

For Stain it was clear that Siren wanted a little bit of fun but at the same time he also wanted to let them know that even if he was on top of LOV and also leading the hero commission, there was still a chance of them being attacked and that they need to be cautious at all time. Well that was at least what Stain thought.

In reality however, Izuku just wanted to have some fun and he knew that he would hear from Toga what happened.

Now as to how Stain knew where the LOV is. It was not hard for an ex vigilante and villain to know his way around town. Needless to say the action Tomura took to gather all the villains for the USJ incident was not unheard.

And that was how Stain knew where the LOV's hideout was. All he did was listening to all the rumors and then check if they are correct. He never knew when an organization went after him and so he made sure to know the location and the deal of every single one of them but he somehow missed the information that the LOV was connected to Siren. Impressed that was what Stain was. Izuku's skill in leading and hiding information was too good for his age.

Now after running and jumping from roof to roof he finally arrived at his destination. He went straight to the rooftop door and lock picked it. Next thing he went in and slowly began searching for the members.

First room he checked was empty but what he found laying there was more than what he imagined. There on the bed were a couple of knifes and so he went ahead and picked them all up and went behind the door after hearing someone approaching him.

It was Toga's room and the poor girl had no idea what was about to happen to her. She came into the room as if nothing happened but once she saw that her beloved knifes where gone she immediately looked below the bed and on the table never even once turned around to face Stain.

Stain: You searching for this?

After Stain said that Toga jumped and turned around. The sudden voice clearly startled her.

Toga: Oh yeah thanks!

She was about to approach Stain if not for him pinning her to the wall with her very own knifes.

Toga: AAAAAHHHH!!!!

He then went to her side and used his quirk on her.

Toga: AWW all the beautiful blood.

Stain: I agree. It is very beautiful on you.

Toga: Awww thanks!

Stain: Izuku send me here.

Toga: Zuzu did?

Stain: Yeah. I am the new recruit.

Toga: Ohh welcome aboard!

Stain: Can you sit still or do I need to put something in your mouth.

Toga: ....

Stain: Good. Izuku told me I am free to test you and you failed.

Toga: Arg. Nooooo. Let's do a redo.

Stain: In real live there are no redo's.

With that Stain left the room and went downstairs. It was the bar area and he could tell that all the reminding members are there. Now all he needed to do was go in paralyze everyone and he won. Easy peasy right?

So here is what Stain did.

He entered the room as if he owned it and sat there on the counter.

Stain: Do you have some Vine?

Kurogiri: White or Red.

Stain: Blood Red if you have.

Kurogiri: One moment please.

While he was ordering his vine, Dabi looked at Stain perplexed while Tomura was too busy playing his game.

Dabi: What the fuck are you doing here?

And without even turning around Stain threw his knife at Dabi. The knife was thrown in a way that every dumbass could have caught it.

Dabi: Yeah nice try.

Nedless to say Dabi fall for the trick and caught it with his hand cutting himself. He then went to the counter and nearly stabbed Stains hand to the desk.

Dabi: I think this slipped your hand.

Stain: Oh really now.

All Stain did was take the knife lick it and Dabi was on the ground completely out of the game.

Stain: I really hoped that the all mighty Dabi, a Todoroki by blood and a little bit trained by Endeavor himself would see the trap. You have much to learn.

Dabi: I lived several years on my own. Thank you very much, I don't think I need to learn anymore!

Stain: Oh really now?

Dabi: YES!

Stain: Then why were you tricked now? Haven't you learned anything? I thought that you did a lot of jobs for the villains. I even heard that if you need anything one should go to you. From stealing, delivering to torturing.

Dabi: That was my past.

Stain: Let me guess Siren saved you?

Dabi: How..

Stain(whispering): Izuku send me himself!

He then looked up to Kurogiri took his vine glass and went to Shigaraki who was way into his game to even realize what was happening around him.

Stain: What's up with that kid?

Kurogiri: You could stab him and he wouldn't care as long as he wouldn't loose.

Stain: Where is the fucking FI-switch?

Kurogiri: Right here.

Mamagiri then pointed to the wall and to the box hanging there that was in charge of the electricity in the house.

Stain: Do you mind?

Kurogiri: Nope.

Stain went to the box and turned the electricity down. Naturally the game crashed and Shigaraki immediately jumped up and turned around.

Shigaraki: WHO OF YOU FUCKERS WANNA DIE?

However it was already too late and Stain was already standing behind him slightly cutting his neck and licking it.

Kurogiri: I guess it is my turn now..

Stain: No. Don't bother. You gave me such exquisite vine.

Shigaraki: What the fuck do you even want here?

Stain: Izuku send me here and this was a test. You all failed right now.

Shigaraki: Izuku did?

Dabi: What's up with the test?

Kurogiri: That doesn't sound like Izuku.

Dabi: Wait where is Toga?

Stain: Hanging on the wall in her room.

Shigaraki: What did Izuku tell you?

Stain: He told me I was free to scare you guys.

Dabi: YOU SON OF A BITCH! He literally meant to scare us and not to test us!

Shigaraki: Thanks to you I lost all my data and I was on the last level!

Stain: Welp it can't be help. I am here to shape you guys up.

Kurogiri: Welcome and don't get overboard with them.

Stain: Oh I won't.

Dabi: That's a mothefucking lie!

Shigaraki: If this helps our titan then so be it.

Stain: Titan?

Kurogiri: He calls Siren a titan.

Stain: Ohhh. Well I am the new member and nothing will happen to you guys on my watch!

After that and after the effect of Stain's quirk wore off all the LOV members gathers in the bar and began sharing their information about Izuku and how they met him. At the end everyone was grateful to him and would do anything for him. It turned out that both Toga and Dabi got themselves into a black hole and both were spiraling down, drowning in their emotions and lost all motivation to live any longer and that's when Izuku found them.