Luka Millfy is Gokai Yellow, the Yellow Ranger of the Gokaigers. A tomboy and the ship's lookout who dislikes needing to have a reason to act. Excels in recon and exploration, and has a strong tenacity for treasure hunting, earning her respect from her peers. However, her need to get treasure often makes her forget the mission is in front of her, be that when it comes to the enemies, or her friends. Having grown up in a poor family, Luka appreciates the value of money to the point of greed. 