Jean is in her office when she hears some arguing/fighting leaving her office and heading outside of the building

Amber: We don't know you. Get out.

Kaeya: Now, now Amber. No need to be rude to them.

It seems like the person, Amber and Kaeya were fighting

Lisa looks through the window of the library in the building before heading out as well

Lisa & Jean: Sierus!?

Jean: Amber, Kaeya, back off.

Lisa: Sierus, darling, we haven't seen or heard from you in a while...