She was working in engineering when Michael Burnham was assigned there. She informed Burnham as to where Lieutenant Paul Stamets was working, but also told her that she did not have access to that area. She advised her to take a station. (DIS: "Context Is for Kings")
Harrington was portrayed by Devon MacDonald. The character was unnamed in the first appearance in "Context Is for Kings" (credited just as "Engineering Officer"), and referred to by her name in her second appearance in "The Wolf Inside" (credited as "Service Engineer").