This article is about a/an ranger in Mighty Morphin Alien Rangers.
"It's Morphin Time! Blue Aquitar Ranger Power!"
―Morphing call

Cestro, is the Blue 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 Blue Alien Ranger on Earth, as well as Mighty Morphin Alien Blue Ranger a variation on his alternate in-show label, though it is more in reference to the show itself than a proper label.

Character History

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).

In Space

During the invasion of the universe by Dark Specter's United Alliance of Evil, Cestro and the other Aquitian Rangers battled Divatox's army on Gratha, where they were defeated. They were later saved by Zordon's Energy Wave. Countdown to Destruction

Super Megaforce


Cestro and the other Aquitian Rangers returned as part of the army of Legendary Rangers that helped the Mega Rangers defeat the Armada once and for all, fighting in a huge battle against hundreds of X Borgs and dozens of Bruisers. He then returns to Aquitar. Legendary Battle

Blue Aquitar Ranger

Ranger Costume



"Blue Aquitar Ranger Power!"

Appearances: MMPR S3 Episodes 35-43, Zeo Episode 48, PRIS Episode 42, SM Episodes 20 & LBEV

Ranger Key

The Blue Aquitar Ranger Key.

The Blue Aquitar Ranger Key is Cestro's personal Ranger Key. This key along with the majority of the Core Ranger Keys are seen lining the Command Center's interior walls. This key is mainly used by Noah Carver (Super Megaforce Blue) who uses it to fight as the Blue Aquitar Ranger.


  • Cestro is the first male Blue Ranger to have a light blue costume (sky blue) (followed by Jungle Fury Shark Ranger and Dino Charge Aqua Ranger) because in Kakuranger his counterpart Saizou has feminine behaviors (and his speech pattern is similar to that of a girl). Most Blue Rangers after Choujuu Sentai Liveman who are light blue are usually female.
  • Cestro's calm, intelligent personality contrasts with his Sentai counterpart Saizou who is a loud-mouthed, bumbling fool.
  • He is the only Ranger with a light blue costume to not have water-based powers but he does live on a water planet.
  • Of all the Alien Rangers, Cestro has made the most return appearances.
  • Cestro is the only one of the Alien Rangers to morph individually on screen. All of the others only morphed as a group.
  • Due to Mighty Morphin Alien Rangers being a mini-series, Cestro is the only Zordon era Blue Ranger whose teammates are not in other Ranger teams within the said era.

See Also


Blue Rangers
Billy (1995 movie)Billy (2016 comic)SergeBilly (2017 movie)EddieNikolai

Secondary Rangers
NinjorAuricBlue SenturionBlakeShark RangerJames
Billy PuttyPuttyBobbyWilliamBilly CloneStanfordBlue Shadow RangerRobo JustinBlue Creep
Psycho BlueBlue Cyborg RangerEvil Time Force BlueShark Shadow RangerEvil BlakeA-Squad Blue
Evil Blue Mystic RangerEvil Blue Overdrive RangerCenozoic era Blue RangerRobo Blue Space Ranger

Power Sets
Blue RangerBlue Aquitar RangerZeo Ranger III BlueBlue Turbo RangerBlue Space Ranger
Galaxy Blue RangerBlue Lightspeed RangerTime Force Blue Ranger
Blue Wild Force RangerBlue Wind RangerBlue Dino RangerS.P.D. Blue RangerBlue Mystic Ranger
Blue Overdrive RangerJungle Fury Blue RangerRanger Operator Series BlueBlue Samurai Ranger
Megaforce Blue RangerSuper Megaforce Blue RangerDino Charge Blue RangerDino Charge Aqua Ranger
Ninja Steel BlueDino Charge Dark RangerBeast Morphers Blue RangerDino Fury Blue Ranger
Blue Ranger (movie)

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