Aaron Stiles was a United Earth Starfleet officer during the Earth-Romulan War, and captain of a Christopher-class ship. He fought in the Battle of Cheron, along with his brother, Jake Stiles, who was killed in that battle. Both brothers were part of the Stiles family, a long lineage of space travelers and Starfleet officers that would extend into the 25th century. (ST novel: Starfleet: Year One, STO novel: The Needs of the Many)