Lucky was a clone trooper who served in the 501st Legion of the Grand Army of the Republic during the Clone Wars. During the Battle of Quell, Lucky boarded a Low Altitude Assault Transport/infantry with Jedi General Anakin Skywalker, Jedi Commander Ahsoka Tano, Clone Captain Rex, trooper Cameron, and several other clone troopers to race towards the besieged Venator-class Star Destroyer Liberty, flagship of Jedi General Aayla Secura of the 327th Star Corps. After Skywalker boarded the ship by hitching a ride via a B2-RP super battle droid, Lucky and the others boarded in a crash-landing, which took out many of those aboard the gunship. Lucky survived, as did Tano, Rex, Cameron, and another trooper, although that other clone trooper would be killed shortly into the boarding effort. Upon boarding the Liberty, they would be joined by 327th clone trooper Flash and reunite with Skywalker.
After finding Secura and Clone Commander Bly and fleeing to the planet Maridun, Lucky was killed by mastiff phalones along with Cameron and Flash.
Lucky appeared in the Star Wars: The Clone Wars episode "Jedi Crash," where Lucky was identified after their death, alongside fellow clone troopers Flash and Cameron. The 2022 encyclopedia "The Grand Army of the Republic" would later state all three clones were members of Aayla Secura's task force rescued by Anakin Skywalker and his intervention into the Battle of Quell, but this is not possible: "Jedi Crash" shows Ahsoka Tano and Rex board the Liberty with three clone troopers from the 501st, only for one of those troopers to die. By the time they join up with Skywalker once more, a new third trooper has joined the team. Whether this new third clone trooper is a member of the 501st who boarded via one of the other gunships, or is a member of Secura's task force who was found by the team, is not explained. All that is clear is that at least two of the troopers present must be from the 501st because they were shown boarding with Rex and Tano.
As such, this article assumes that "The Grand Army of the Republic" is incorrect and that Cameron and Lucky are actually the two 501st troopers who boarded with Tano and Rex. Flash was independently confirmed to be part of the 327th, as he was depicted as part of the unit in the 2019 audiobook Choose Your Destiny: A Clone Trooper Mission, so this article assumes "The Grand Army of the Republic" is correct in listing him as a survivor of Secura's crew. Therefore, Flash is the new third trooper found by the team, being a member of Secura's crew who ends up escaping the battle with the team. Meanwhile, Cameron and Lucky can be the two troopers who survived the boarding to account for the 501st clones.