It's in the site source - although unclear whether this is used directly in the front-end.

In Google Chrome, you can View > Developer > Developer Tools > ⋮ > Search > "you are"

It shows up in this file as of writing this comment:

https://www.y2k.movie/_next/static/chunks/725-60697f355a8830...

Funny enough, I didn't check the source, I just jailbroke it into replying assuming it was done server side

There are certain topics that will shake ChatGPT out of whatever roleplay it's been assigned and back into being its typical self, chatting about those gets it to drop the act long enough to follow instructions about the prompt