Charlie

Charlie is an employee at O.V.E.R. who is known to be vigilant and observant. She has shoulder-length red hair, and she was "close" with Marissa Ng. Charlie was eventually recruited to Base after the first version of Base was destroyed by Hunter.

Charlie has exhibited protective behavior toward Mike Walters. Based on how Mike reacted to his first visit, Charlie became suspicious of Ryan, and on his second visit she refused to call Mike on his behalf or even let him look through the front gate. She later gave Mike a code word ("bluebird") for him to signal when he was in trouble. Because of this protectiveness, the Mikes briefly suspected Charlie in Ryan's disappearance, but they ruled her out because they trusted she would have told him.

Charlie's memory, observational skills, and post at the front gate allowed her to identify Kasimieras Berzina for Base. She also noted that Kasimieras appeared to be afraid of Ty Betteridge.

Charlie is implied to have been a member of Base prior to the timeline where Mikey recruited her. Specifically, Michael once mentioned that Charlie was the one to name Base "the first time."