Alteans are a species of alien race native to planet Altea and previously ruled by King Alfor. They were once thought extinct, with only Allura and Coran surviving after 10,000 years. However, it is revealed that Haggar and her son Lotor are both Altean; furthermore, Lotor secretly preserved the Altean species by gathering survivors from a across the universe in centuries past, and hid their colony within the Quantum Abyss.
Alteans are aliens nearly identical to humans of Earth. Their defining features are pointed ears and pupils with a colored speck in the center. Alteans are known to have facial markings, usually sickle-shaped under each eye with additional markings possible on their cheeks, foreheads, upper lips, or covering their eyes. The facial markings vary in color by individuals, as do hair, eye, and skin color. The royal family is known to have the traits of silver hair and brown skin in its bloodline.
It is possible for Alteans to alter their appearance by adjusting their height and turning their skin a different color. They can only change one color at a time, and cannot change into other shapes, but this ability is thorough enough to cause Galra technology to recognize Allura as Galran when disguising herself as one.
Alteans are shown to have a lifespan long outlasting those of humans; Coran explains that the Castle of Lions is 10,600 years old by the time the human Paladins arrive on Arus, and states he was alive at the time his grandfather was building the Castleship. This places Coran's age around 600 years old at the very least. He is considered "later in life" or old for an Altean.
Certain individuals of the species appear to have an inherit connection to Quintessence and the ability to channel extensive amounts of the substance, using their own bodies as a medium. Altean energy, presumably a form of Quintessence, is utilized to power Altean technology and has immense healing properties, able to heal damaged Balmera on contact. Such Alteans are known as "Sacred Alteans", and while princess Allura and her father have shown these traits, it is not known if this status is inherent to the royal bloodline.
The culture of Alteans remains largely unknown, but they appeared to be a morally-sound, well-intentioned race that valued diplomacy, protection of allies, respect for the universe, and peace. They were ruled as a kingdom by a royal family, the last known ruler being the deceased King Alfor. Altean technology is highly advanced, powered by both Quintessence and the species' own energy. One of the species' most notable technological advancements was the development of Teludavs for traveling via Wormhole, but only a few Alteans were capable of powering such a device.
While advocating for peace, Alteans were not above combat. The society trained its members for close-combat at a young age and the king himself held skilled swordsmanship. The culture seemed to hold warriors in high regard and used the color pink to honor fallen warriors. Alteans had a large military fleet of spacecraft vessels equipped for destructive battle and peaceful exploration, and these ships were powered by the Crystals produced by the living Balmera planets. True to their respectful nature, Alteans had a mutually-beneficial relationship with the creatures and infused them with Quintessence after extracting their Crystals. King Alfor had specific vessels for deep space exploration called Tel-Galax exploration shuttles.
Alteans of the past used their mimicking abilities to blend in to other societies for information, negotiating, and exploration. The species thus came to be known as great explorers, diplomats, and highly intelligent alchemists. Their currency was called "groggeries" which came in the form of Altean crown bills and was used by more races than their own. The groggery was named after "King Groggery the Infirm" and had his face printed on the bills.
- Alteans can suffer from a harmless condition known as "the slipperies", where their bodies excrete extremely slick fluid to such an extent that walking is nearly impossible, as the Altean will likely slip, fall, and slide instead. The condition is common for Alteans of older age and usually only lasts a couple of days.
- "Sloven-day-ho" is Altean for "gone".
- "Groggery" is spelt "Grogory" according to the official Voltron Twitter account, in contrast to the comics and Netflix subtitles. "Grogory Day" is an Altean holiday celebrated by Alteans complimenting each other, and is celebrated on December 8th.
|Team Voltron||Allura ◆ Coran ◆ Hunk ◆ Keith ◆ Lance ◆ Pidge ◆ Shiro|
|Galra Empire||Acxa ◆ Beta Traz Warden ◆ Bogh ◆ Branko ◆ Dayak ◆ Ezor ◆ Galra Commander ◆ Gnov ◆ Haggar ◆ Haxus ◆ Janka ◆ Ladnok ◆ Lahn ◆ Lotor ◆ Morvok ◆ Narti ◆ Prorok ◆ Raht ◆ Ranveig ◆ Sendak ◆ The Archivist ◆ Throk ◆ Trugg ◆ Zarkon|
|Blade of Marmora||Antok ◆ Kolivan ◆ Krolia ◆ Regris ◆ Thace ◆ Ulaz|
|Galaxy Garrison||Iverson ◆ Matthew Holt ◆ Samuel Holt|
|Alteans||Alfor ◆ Bandor ◆ Romelle|
|Arusians||Arusian King ◆ Klaizap ◆ Moontow|
|Balmerans||Shay ◆ Rax|
|Mer||Blumfump ◆ Florona ◆ Luxia ◆ Plaxum ◆ Swirn|
|Olkari||La-Sai ◆ Lubos ◆ Ryner|
|Other Aliens||Baujal ◆ Myzax ◆ Nyma ◆ Olia ◆ Ozar ◆ Rolo ◆ Remdax ◆ Sal ◆ Slav ◆ Te-osh ◆ Vakala ◆ Varkon ◆ Xi|
|Other Humans||Colleen Holt ◆ Keith's Father|
|Robots||Beezer ◆ Rover|
|Aliens||Altean Scientist ◆ Hira ◆ Slav|