The sister is named Aurora. Senukin posted a character sheet for her a few weeks ago, but deleted it before I could asset it.

To be fair, this is a pretty tame version of Brainrot. I could understand the meaning behind his words at the very least.

That said, it's still a slippery slope.

Their expressions remind me of something, but I can't tell. It just looks familiar somehow

@Homies4Life : The sister look like that Rock's meme with the eyebrow and the GF have an expression similar too Shikanoko Noko

For the dude, I don't know

Reminds me of Munmu-san.

It's over for you, my dude.