Crewman Alison was a Starfleet enlisted crewmember serving aboard Enterprise NX-01 as an engineer during its mission of exploration.
In 2152, while she was trapped in an elaborate, transporter-induced illusion, Hoshi Sato passed Alison in a corridor and greeted her, but received no response. (ENT: "Vanishing Point")
Alison was played by actress Carly Thomas.
As evidenced by the final draft script of "Vanishing Point", this character was at one time intended to be a male whose surname was "Rhodes". According to the resume of Carly Thomas her character was named "Alison Rhodes".