Chell

Intro Chell is a tenacious and stubborn woman who is a test subject for Aperture Science, a prestigious scientific research facility based mostly underground, to test the Aperture Science Handheld Portal Device to solve a series of increasingly challenging puzzles. She is also the (in)famous human that was able to defeat GLaDOS long ago, and is partly known for her muteness (or refusal to speak) as well. Chell later became allies with GLaDOS when an awkward yet friendly core named Wheatley, who had planned to escape the facility with Chell after defeating and overthrowing an awakened GLaDOS (whom he had accidentally awakened), became corrupt with power, betrayed Chell, put the powerless GLaDOS into a potato battery, and sent both of them deep into the oldest parts of the facility down an elevator shaft, where Chell and GLaDOS worked together to reenter the main facility, all while facing many challenges on the way, including old tests, old recordings of the facility’s late founder and his zealous and passionate monologues, occasionally accompanied by his assistant, Caroline, and the truth of GLaDOS’s sad, forgotten past while going on a journey of self-discovery, eventually returning to the main facility to defeat and overthrow the chaotic and irresponsible Wheatley and to put GLaDOS back in charge of the facility in her rightful position in exchange for Chell’s freedom from the facility she’d been kept at for years and where she had been forced into testing by GLaDOS for many years prior to their alliance. As promised, after helping GLaDOS take back the facility in her rightful position and restore balance to Aperture (as well as literally banishing Wheatley to space), GLaDOS sends Chell to the surface, above the underground science facility, and to her freedom.