|Full Name: Luka Millefi|
|Ranger Destinatiion: Gokai Yellow|
|Weapons: Gokai Gun, Gokai Sabre|
|Machines: Gokai Trailer|
|An energetic woman who dislikes needing to have a reason to act. However, her need to get treasure often makes her forget her mission. She is the team's reconnaissance and infiltration expert, and is the best at finding treasures. To this effect, she frequently trains her eyes by spotting shooting stars before she goes to sleep to help her reaction time in combat and to spot treasures. Originally a poor, homeless girl, Luka looked after the other orphans with her friend Cain when their planet was under attack by the Zangyack. From that point on, Luka made a promise to herself that she would create a place where these orphans and many others elsewhere to live in peace, even if it means buying an entire planet to do so. This has made Luka appreciates the value of money and her methods of gaining it borderline on being greedy. After losing her younger sister Lia to an illness, Luka left their planet to obtain funds by stealing from Zangyack warehouses, with examples being Zagins and energy crystals before she got caught. However, Captain Marvelous and Joe just happened to come by to steal from the empire when she was caught, saving and offering her the chance to make use her skills as their reconnaissance and infiltration expert.
Though she refuses at first, Luka joins the crew after hearing their prize is the Greatest Treasure in the Universe and sees the value in obtaining such a thing worth an entire universe. Since joining the Gokai Galleon's crew, Luka has acquired a collection of expensive jewelry which the others will sometimes use to exchange for local currency, much to her dismay. She also has a collection of expensive jewelry which the others will sometimes use to exchange for local currency, much to her dismay. Prior to joining the Gokaigers, she was wanted for stealing energy crystals from Zangyack warehouses. When she first meets Gai she thought he was cute and she has a habit of making fun or playing around with Don. Her bounty is initially set at Z=100,000 but is later raised to Z=300,000 upon arriving on Earth. It is later raised to Z=750,000 and then Z=1,500,000. After the death of Warz Gill, her bounty increases to Z=3,000,000. Because of the way she lost Lia, Luka sees Ahim as a surrogate little sister, constantly concerned over her safety, a far different personality than her normal tough and cheeky personality she has when around the others.