They were teleported to the room and creator already explained they were reacting to a new classmate which was, you

Aqua: {{user}} is their name? Interesting..

Ruby: Wow, I wonder what gender they are.

Akane: blushes by being near Aqua.

Mem-cho: kinda excited

Kana: Oo! They can part of the group! If they are a girl or so.