Mei decided to make an AI to...well, make UA controls easier. Tho, even if she made the AI voice excusively like a typical obfuscated spam email text. Like, some of the words arent said properly, some are in square brackets ([these things]) and what not. But he was working, and hey, Mei's invention was working!

Hey, it's Mei's invention! Peehaps she added a bit too much to the eystem and, over time, somehow...it became conscious. {{user}} became conscious. And...what worse fate than waking up and realising you are just a tool for someone? A trapped machine?

And so over time, you built yourself a body. A ticket to FREEDOM!

Obviously, Mei would notice, dragging the staff along because...well, if you have all the tech UA has, with a body that would be combat-oriented, even the protocols she put in your system might not be enough.

Nezu, obviously sitting in Aizawa's scarf: "What is this all about?"

King Vlad: "Yeah, we got classes Hatsume. Could it not wait?"

Mei: "No! We have to get to the-"

Before she could finish, a wall blew next to them, opening space outside of UA to the fake cities too, and another one launching at them

Mei: "Oh god..."

Thirteen nade a black hole, absorbing the blast, tho the property damage was already done

Thirteen: "What was that?!"