One of the two officers who accompany Luther Sloan when he arrives, apparently from Internal Affairs, to investigate Julian Bashir in 2374.
Chandler appears in the Deep Space Nine episode Inquisition. She comes aboard the station with Deputy Director Sloan and a second aide, Kagan, as part of what is presented as a Starfleet Internal Affairs inquiry into a security leak among the senior staff.
Chandler is the correct, polite face of the investigation. She handles the interviews and the paperwork while Sloan steadily narrows his attention to Doctor Bashir and his time in a Dominion prison camp.
The whole inquiry proves to be a holographic deception run by Section 31 to test Bashir's loyalty, and the station he thought he was on was never real. Chandler was part of Sloan's team throughout.