Icon-mmar.pngThis article is about a/an ranger in Mighty Morphin Alien Rangers.

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).

Zeo Era

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. Tvicon.png TV STORY-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. Tvicon.png TV STORY-Legendary Battle

Split History

Shattered Grid

Teamming up

All Rangers reunited against lord Drakkon

When events set into motion by Lord Drakkon caused the timeline to split into pocket universe, each anchored on a powerset, the Alien Rangers were split off into their own pocket universe. Blue Aquitar Ranger eventually received Zordon's call through the Morphin Grid and was among numerous Rangers who rallied to his pocket dimension led by the Quantum Ranger for the last stand against Lord Drakkon, reunited in the Command Center.Comicicon.png COMIC STORY- Mighty Morphin Power Rangers (Boom! Studios) Issue 29

Battle in moon and lost his powers

Cestro lost his powers by Lord Drakkon

The Alien Rangers like the others team Rangers teleport to the Moon of the World of the Coins, facing some new types of Ranger Sentinels, Cestro is horrified by the power of the serpentine, but this distraction leaves him open and his powers are taken by Drakkon with his sword.Comicicon.png COMIC STORY- Mighty Morphin Power Rangers (Boom! Studios) Issue 30, Cestro's timeline was later restored by the Mighty Morphin Rangers after they defeated Drakkon.

Video Game Appearances

Power Rangers Key Scanner

Blue Aquitar Ranger in Power Rangers Key Scanner

Cestro as the Blue Aquitar Ranger appears in the app videogame Power Rangers Key Scanner,amoung various other Rangers teams.

Blue Aquitar Ranger

Ranger Costume



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

Morph and Roll Call

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.

Behind the Scenes



  • 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.


See Also


Blue Rangers
Billy (1995 movie)Billy (Coinless)SergeCenozoic Blue RangerBilly (2017 movie)Eddie
Lina SongNikolaiBlue Emissary

Secondary Rangers
NinjorAuricBlue SenturionBlakeShark RangerJamesHeckylKiyaYale
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
Blue Battalion RangerBlue Blitz RangerBlue Prism RangerBlue Lightning RangerBruteBlue Squadron 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)