Wheatley/ko

Background
Prior to the events of Portal 2, Wheatley took charge of maintaining the Extended Relaxation Center - which houses test subjects in long-term cryogenic stasis before and after they are put through the testing courses. However, what he has done to actually manage the entire wing remains unmentioned. It was only until many centuries later that Wheatley decided to escape the facility. To accomplish this, he attempted to gather help from any remaining test subject that managed to last centuries after running out of cryogenic supply. Luckily for him, Chell was one of them if not the only one that lasted.