Aquitian Rangers
The Aquitian Rangers, sometimes referred to as the Alien Rangers on Earth, are fictional characters and heroes from the Power Rangers universe, starring in the television series Mighty Morphin Alien Rangers. They are directly based on the sentai team Ninja Sentai Kakuranger, the first use of an entirely different sentai team in Power Rangers.
They are a team of Aquitian Power Rangers from the planet Aquitar, and telepathically control the Battle Borgs in battle. They were summoned to Earth by Zordon after the Earthen Rangers were rendered powerless and transformed into children by Master Vile. They departed the planet again shortly before the destruction of the Command Center and the beginning of Power Rangers: Zeo. They are the first known team of Power Rangers existing on a planet other than Earth.
During Dark Specter's invasion of the universe, as shown in the monumental Power Rangers in Space episode, Countdown to Destruction, the Aquitian Rangers were beaten by Divatox's army on Aquitar.
Aurico
Aurico, played by David Bacon, is the Red Aquitian Ranger. Though technically Delphine is the leader of the team, as Red Ranger, Aurico is often considered an informal field leader. He pilots the Red Battle Borg and, during his stay on Earth, the Red Shogunzord, as well. He is the first non-human Red Ranger Followed by andros
Aurico was last seen during Power Rangers: Wild Force, on the episode Forever Red, as one of the ten Red Rangers that attacked the remnants of the Machine Empire on the moon as they attempted to reactivate Serpentera. He did not appear unmorphed in this episode, and was voiced by Christopher Glenn.
Delphine
Delphine, played by Rajia Baroudi, is the White Aquitian Ranger. She was the leader of the team, and was the first female to be a Power Rangers team leader, though, as Red Ranger, Aurico is sometimes considered an informal leader. A similar situation was used in the later series Power Rangers: Time Force in which the character Jen Scotts, the Pink Ranger, is the leader but stories tend to revolve around the Red Ranger, Wesley Collins.
Delphine pilots the White Battleborg and the White Shogunzord.
Tideus
Tideus, played by Jim Gray, is the Yellow Aquitian Ranger. Tideus is a very serious person who takes his duties as a Ranger extremely seriously. Tideus is physically the strongest of the Aquitians, and also is one of the healthiest. Tideus was entrusted with the power of the Yellow Battle Borg and the Yellow Shogunzord.
Tideus was the first known male Yellow Ranger, followed by Waldo "Dustin" Brooks and Charlie "Chip" Thorn.
Cestro
Cestro, played by Karim Prince, is the Blue Aquitian Ranger. He is entrusted with the power of the Blue Battleborg and Blue Shogunzord.
Like his Mighty Morphin counterpart, Billy Cranston, Cestro is a technological genius. When Billy successfully managed to restore his own age by means of the Power Coins before they were destroyed, he and Cestro frequently worked together to find a similar cure for the other Rangers - as well as finding a means to keep the Aquitians hydrated with pure water. In this way, Cestro was the Alien Ranger who received most attention in storylines (alongside Delphine, the team leader).
Cestro had a guest appearance in Power Rangers: Zeo, in which he came to Earth again, seeking Billy's help to fight off a menace on Aquitar called the hydro-contaminators. Billy's trip to Aquitar saw the beginning of the story arc in which he was permanently written out of the show. Indeed, the Aquitian that Billy falls in love with on Aquitar, Cestria, is believed by some to be Cestro's sister or similar relative (though others dispute this because of the different races of the actors playing the two characters).
Corcus
Corcus, played by Alan Palmer, is the Black Aquitian Power Ranger. He is the quietest member of the team, often lurking in the background, but he fights with extreme ferocity against his enemies. He controls the Black Battle Borg and the Black Shogunzord. he is the first (and only if one does not consider Trey of Triforia and Doggie Crugger as) non-human Black Ranger