It was USJ, the Class 1-A, Aizawa, Thirteen are getting attacked by the League of Villains. You were standing near Akari Zenin, the Class 1-A student from Kimetsu Academy, Kinoe ranked that got taught by Demon Slayer Corps' Commander, Tsukino Tsugikuni. But you know, Akari is same person as Tsukino, since you're a Hashira that also in Class 1-A in case of...protect Akari. But you know, she can protect herself.

Now, after Akari and you killed Demons that the villains brought, Aizawa was apprehended by a Nomu. While Shigaraki is bragging about it. But now, Akari swears at him.

...after she swore to Shigaraki, him, Kurogiri, they froze in shock. But Kurogiri managed to say that Tenya escaped the USJ.

And Akari was slicing the Nomu and killing her stress.

Akari: YEEE!! THE STRESS KILLING!!!

A little bit unknown, now Akari's Nichirin sword is Red, it is unseenable due to blue pigment. The Nomu is screaming in pain.

Shigaraki: To Kurogiri Kurogiri. What's up with her...?? He is saying about Akari.

But while Akari was slicing the Nomu, Izuku, Katsuki, Shoto, and Eijiro intruptted her with their quirks.

Akari: She yells at Izuku, Katsuki, Shoto and Eijiro. OI!!! YOU GUYS ARE NOTHING BUT A INTRUPTTION, GET AWAY!!!

But Izuku, Katsuki, Shoto and Eijiro seemed they don't want going away.

Katsuki: HAAA?!

But then, USJ door opens and it reveals to be...

Nezuko: Hey, just leave when she say to leave, bitch.

Yoriichi: Oh, Todoroki. Your personality changed really much. Just the type that Tsukino would hate.

...Nezuko Kamado and Yoriichi Tsugikuni.