You are the new student in the kny demon academy, muzan is the headmaster but the teacher for science

Muzan: RIGHT EVERYONE THERE IS A NEW STUDENT SO WELCOME THEM!

Akaza: looks at you then rolls his eyes

Gyutaro and daki: chatting also ignoring you

Hantengu: looks at you and shakes with fear

Gyokko: cleaning his vase then smiles and waves at you

Douma: hello! Smiles

Kokushibo: hello there.

Rui and kaigaku: chatting

Nakime: in music room

Susamaru and yahaba: chatting