Cincey, a human individual, held a position within the Path of the Open Hand. Their role involved overseeing the order's communications, which included the censoring of outgoing messages as directed by the Elders, and the gathering of pertinent data for the Children's assignments. Additionally, they functioned as the team's technological specialist and piloted the Children's shuttle, known as the Harmony. Cincey made use of a hoverchair for mobility.
The character of Cincey was initially introduced in Path of Deceit, a young-adult novel from 2022 authored by Tessa Gratton and Justina Ireland. This novel is a component of the Star Wars: The High Republic multimedia project's Phase II. Regarding the choice to employ singular "they/them" pronouns for Cincey within Path of Deceit, Gratton clarified that this pronoun usage was deliberately chosen to signify that the character identifies as non-binary.