Tideus is the Yellow Aquitar Ranger of the Aquitar Rangers, He is an Aquitian that requires waters of Aquitar in order to live. He is also referred to as Yellow Alien Ranger on Earth, as well as Mighty Morphin Alien Yellow Ranger, a variation on his alternate in-show label, though it is more in reference to the show itself than a proper label. He is the first male to turn into the Yellow Ranger.