[With GLaDOS from
here]
Nny stayed behind GLaDOS until they reached the stairs, at which point he moved up front to provide light. It seemed unusually empty, a fact he welcomed. Hopefully the second floor would be empty, or at least emptier than the first. He angled his flashlight upwards and ascended the stairs.
"Second floor, right? Which way after that?" he asked. The quicker they got to the kitchen, the better.