The G-Man

The G-Man is a mysterious and enigmatic character encountered several times in the Half-Life series. He plays the role of an overseer and eventual employer, watching over Gordon Freeman and other characters as the series progresses, at times helping or hindering them.

Chell from Portal

In the Portal games, Chell is essentially a lab rat for Aperture Science, performing tests under the supervision of the AI bot GLaDOS. It’s not long before Chell sees her chance to escape the testing facility using her portal gun.