Aaron Kelly is a fictional male in the Battlestar Galactica series. The character was portrayed on screen by Ty Olsson. Captain Aaron Kelly is a senior member of the Battlestar Galactica crew, he is the Landing Signal Officer, responsible for bringing the Colonial Vipers safely back onboard the Battlestar Galactica. He is the third in command after Commander William Adama and Colonel Saul Tigh. He is a new character and there is no direct connection between him in the re-imagined series and the original series.
Although senior, he is a minor character in the series. He takes on Saul Tigh's duties when Adama is shot by Lt. Sharon Valerii ( Boomer ). Saul Tigh takes on the duties of the commander.
When Dr. Gaius Baltar is put on trial, it is Aaron Kelly who assassinates Dr. Gaius's Baltar first defender leading to Romo Lampkin taking on the role. Aaron Kelly is prevented from carrying out any more assassinations by chance and is arrested. Later on, he would side with Tom Zarek and Lt. Felix Gaeta on the mutiny. Aaron Kelly would swap sides once more later after disquiet about Tom Zarek assassinating the Quorum of the Twelve who refused to give legitimacy to Tom Zarek as the new President. Aaron Kelly assists Capt. Lee Adama ( Apollo ) and colleagues in preventing the execution of Commander Adama.