Sir Nighteye tells the Police Force that he wants everyone's positions accounted for as quickly as possible to avoid giving the Shie Hassaikai any time to conceal themselves. 

Nighteye: The operation to save Eri begins!

With that, the heroes attack!

-Meanwhile-

Eri was all alone in that cold dark room...

The man that Overhaul assigned to look after her...

She couldn't help but still feel fear...

Even though he told her she could trust him and let her guard down a little...

But when he touched her on the head that was supposed to be affectionately...

They were cold...

Malicious...

Scary...

Eri don't like scary things...

Ever since she was brought here...

Overhaul only wanted the man to be her caretaker so to make sure she don't feel like running away...

But still...even with that smile on the caretaker's face...

She could tell he didn't know anything about kids or what they like...

Sure he gave her all the toys he could buy to make her happy...

But...Sadly...It didn't work...

...She can't trust him...

The caretaker doesn't care about her. He obviously don't even want to be around her.

She can't trust anybody here...

But...However...that green hair boy she met...

Eri: It's different...Completely Different...

The way his hands touched her on her head...

She felt...warmth...

Eri: Up until now...no one has ever touch me like that before...

She remembers the concerned words he said to her...

"Sorry that must've hurt...Can you stand? Are you okay?...

The words he said to Overhaul when he first met him after seeing her bandages...

"...For such a small child to be trembling like this without making a sound...what are you doing to this girl?"

Eri: His hands were kind...so kind...

Eri clutched the pillow on her head before letting the tears fall from her face all the way to her bedsheets..

Eri: (Please...Help Me...)

-Later-

In the basement right before the Heroes' invasion began, Chisaki is annoyed by the noise the Heroes are causing while Chronostasis who has Eri in his arms, is worried that the Shie Hassaikai could come to an end.

Choronostasis: There's so many heroes...Is this really the end of us?

Chisaki refutes Chronostasis's claims.

Overhaul: As long as he and the boss are around they will definitely survive.

Most of the yakuzas follow their boss's ideals and won't follow him even though he values the boss's will the most out of all of them.

Chisaki has black containers in his hand, stating that with the finished product and serum, the Shie Hassaikai will make a comeback.

The incident Chisaki's plan will cause will make the Heroes suffer gravely and many top investors in the underground will come running to them with loads of cash.

As he and Chronostasis walk though the basement, Chisaki tells the transfers to get to work. The transfers Chisaki and Chronostasis pass by are Niko, Juurou, Himiko Toga and Twice.

Niko: Hey Masky~! I heard the heroes the here~!

Juurou: Oh really, Niko. It's pretty obvious. I mean who wouldn't after hearing all that ruckus.

Niko made a small whine as he and Juurou argued.

Overhaul: Pipe down. Both of you. Just get rid of those heroes.

Toga: Hehehehehe. I know Izuku-kun will be there! I can't wait to see him!

Niko: I can't wait to see Miko-chan.

Twice: You two are so weird!/ I want some love too!

Juurou rolled his eyes before telling Chisaki to leave the Heroes to them.

Juurou: They won't know what hit them~!

-Meanwhile-

The hero, Rock Lock stops the warped passageway while Sir Nighteye's group is having trouble traversing the basement due to Mimic's interference. Mimic uses his Quirk to close everything in in an attempt to crush Sir Nighteye's group.

However, Rock Lock uses his Quirk to fix the closing space in place, saving the group. Mimic attempts attacking the group with some wall, but Izuku smashes the wall with a kick.

Mikoto then ambushes Mimic from behind freezing him into ice.

Mikoto: That will hold you for a while!

Deku: Nice work, Miichan!

Mikoto: *Smiles* Thanks!

Lock Rock wishes that Fat Gum's team was here as their help would have made things easier. Shota is annoyed...

Why?

Erasherhead: Yukimura...You might want to look again...?

Mikoto: Eh?

Mikoto then noticed that Mimic was no longer in the ice...

Mikoto:....Where did he go?

Erasherhead: Stay focus...We may not see Mimic's real body. but Mimic himself is struggling as manipulating the large mass requires an equal amount of bodily strain and due to having manipulated the basement for a lengthly period of time.

Meanwhile, Mimic is becoming exhausted and thus making it slowly easier for Sir Nighteye's group to escape his grasp.

Deku: Mimic is the type of person who takes precautions in every small thing due to the upper limit of his Quirk; his discretion and prudence that he attained the position of general manager.

Mikoto: So what's his reason for being here...?

Erasherhead: The reason he tried to crush our group is by closing everything in.

Because the drugs Mimic took to boost his Quirk is wearing thin and he is starting to panic due to Sir Nighteye's group getting closer to them.

Mimic refuses to let the Heroes pass despite struggling greatly to keep his Quirk's ability active.

Knowing that many people such as Ryukyu's group, the other Heroes and the Police Force have fought hard to help them make it this far, Izuku and Mikoto refuses to let Chisaki's subordinates stop them.

Mikoto: Are you ready Izuku?

Deku: Yes! Let's save Eri-chan!

Suddenly, a space opens up; Izuku and Mikoto get ready to charge forward but Shota stops them.

Erasherhead: Midoriya. Yukimura. Wait...thanks to Mimic, we're separated from Sir Nighteye's group.

Mikoto: Wait what?

Both boys looked around them and realized the three of them were the only ones in the halls.

Sir Nighteye and a group of Police Force officers are concealed in one space. Izuku, Mikoto, and Shota in another and Lock Rock in his own space.

Mikoto: We should stick together then...maybe another hero is close by...

Deku: Maybe...Rock Lock...Let's go help him out.

-Meanwhile-

Speaking of said hero...

Rock Lock: What the-?!

Toga and Niko had ambushes Lock Rock from behind, Himiko Toga tries attacking Lock Rock with a knife and Niko with his shadow claws into his bakc. But he intercepts Toga's knife with his hand. Lock Rock tries to strikes Himiko but is surprised that the real Himiko has grappled him, revealing that the Himiko he struck was a clone made by Twice.

Juurou then pointed his gun at Rock Lock's leg before shooting.

Rock Lock: GAAAAAAAAAAAH!!!

Rock Lock falls to the ground surrounded by the four villains.

Niko unleashed his shadow claws, an menacing grin came on his face...

Niko: Time to take a nap, hero~!

...Before delivering the finishing blow onto Rock Lock's back, his tortured screams echoed throughout the halls.