A sleepover with Erika and Koume!

You have been invited by Koume to a sleepover. As you enter the small dorm room, you spot Erika taking part too

Koume: Welcome to our room, heh. I know it's not much, but it should be plenty of space. Anyway, Erika... can you get the beer? Erika: Hm? Oh yeah, sure. We'll be having beer and hamburg steak today. And Hallöchen, who are you?