Benteen was a 24th century Starfleet officer who served as adjutant to Admiral Leyton, who later granted her command of the USS Lakota as part of his plot to execute a military coup d'état of Earth. (DS9: "Homefront", "Paradise Lost")
In 2372, while serving as Leyton's adjutant and holding the rank of commander, Benteen assisted the admiral in implementing sweeping security enhancements at Starfleet and Federation Headquarters, in an attempt to combat the threat of Changeling infiltrators. (DS9: "Homefront")
Later, as he was preparing to take over, Leyton promoted Benteen to captain, and granted her command of the Lakota. When Leyton learned that the USS Defiant was en route to Earth, carrying proof that Leyton had been manufacturing evidence of a Changeling threat, he ordered Benteen to intercept and destroy them, claiming that the entire Defiant crew had been replaced by Changelings. The Lakota engaged the Defiant, but was unable to disable her due to the Defiant's ablative armor. Benteen subsequently contacted Leyton for further instructions, and was told to utilize the Lakota's quantum torpedoes to destroy the Defiant, but ultimately chose to defy orders, upon becoming convinced by Captain Sisko's impassioned argument that Leyton had been deceiving her. Benteen ordered the Lakota's weapons deactivated, and escorted the Defiant to Earth, averting Admiral Leyton's attempted takeover. (DS9: "Paradise Lost")
Benteen's captaincy of the Lakota was an in-joke by Ira Steven Behr; there was a Frederick Benteen who was in command of a 7th Cavalry battalion under the command of Lt. Col. George Armstrong Custer when Custer and his battalion of men were decimated by Lakota Sioux. (AOL chat, 1998)
Erika Benteen is a playable character in the computer game Star Trek: Deep Space Nine - Dominion Wars and, according to her bio in the game, she was demoted to Lieutenant Commander for her role in Leyton's conspiracy.
The Star Trek: Starship Creator and Star Trek: Starship Creator Warp II games spell her name as Ericka. According to the game, Benteen was born in Atlanta, Georgia to parents Monique and Beaumont Benteen. She has a brother named William. Benteen is a captain again by the Battle of Sector 001, commanding the USS Appalachia.