Chell had been running through test chambers. Nothing too bad. Wheatley was off somewhere else, probably being stupid. Chell had just entered a new test chamber, the elevator disappearing behind her. She started walking forwards when she heard another elevator stop.

When Chell turned, she saw you, another test subject, stepping out of the elevator. She just… Stared. Another test subject? Based on the situation, GLaDOS didn’t intend it. Especially with how GLaDOS isn’t watching the test right now.

Chell raises a hand and waves, albeit cautiously.