Galapagus

Galapagus looks exactly like Terraspin except he has white eyes instead of green and lacks the Ultimatrix symbol.

As a member or leader of a peaceful species, Galapagus was quite kind and non-violent. When he thought how to go on a rampage to attract Ben's attention, he only damaged inanimate objects, rather than attacking any humans present. When in Aggregor's custody, he was patient with the other prisoners when they kept insulting him, while also showing disdain at the idea of imprisonment.

Despite his gentle nature, he also had a cunning side and was able to outsmart Aggregor to save the other prisoners.

Galapagus first appeared in the episode "Escape From Aggregor". While Ben, Gwen and Kevin are fighting Dr. Animo, he attacks their hometown of Bellwood. He shows to be able to hold his own against Kevin and Big Chill. Eventually, Gwen realizes that even with all the power he has, he hasn't harmed anyone and suggests to Kevin to use his Plumber Badge (which works as a universal translator) to understand what Galapagus is saying. He then explains that he went on his rampage in hopes that he would draw the attention of the famous Ben 10, who he begged to help him get back to Aldabra. He explains the tale of how Aggregor attacked his home planet, captured him, and imprisoned him with four other aliens: Bivalvan (an Orishan like Water Hazard), P'Andor (a Prypiatosian-B like NRG), Andreas (a Talpaedan like Armodrillo), and Ra'ad (an Amperi like AmpFibian).

When Galapagus, Bivalvan, P'Andor, Andreas, and Ra'ad attempt to escape Aggregor's starship, Galapagus suggests using his communicator to send out a distress message, and was assisted by Bivalvan and Ra'ad. Even though he and the other aliens are put back in the cell, Galapagus' S.O.S. message is heard by Prior Gahlil, who boards Aggregor's ship and finds the five aliens, only to be attacked and murdered by Aggregor. Bivalvan, P'Andor, Andreas and Ra'ad manage to escape again, but Galapagus seemingly betrays them to Aggregor in exchange for his own freedom. When Aggregor admits he wasn't going to free Galapagus, he admits he didn't intend to betray the others, but betrays Aggregor and leads the escape to the shuttle which Aggregor shoots down and causes them to crash on Earth. Afterwards, Galapagus, P'Andor, Andreas, and Ra'ad all split up to find a way off Earth while Bivalvan stays with the shuttle and attempts to repair it. After Ben samples his DNA for the Ultimatrix, he has Galapagus taken back home in a Plumber spaceship. However, Galapagus finds out the pilot is Aggregor in Ghilhil's Plumber suit. Galapagus is seen at the end of the episode "Andreas' Fault" as Aggregor puts Andreas inside a status pod alongside him, Bivalvan and P'Andor.

He was also shown in the episode "Ultimate Aggregor", where he and the others were forced to fight Ben and his team by Aggregor, and he presumably ceased to exist when Aggregor absorbed the five Andromeda galaxy aliens.

As of the end of the episode "Absolute Power: Part 2", Galapagus, as well as all the other Andromeda Galaxy Aliens, came back to life after Kevin was turned back to normal.

Despite his peaceful nature, Galapagus was shown to be capable in battle upon learning how to fight.
Galapagus can create devastating wind blasts and tornados. When doing so, he retracts his head into his shell, opens a hatch to see, his fins become triangular, and his legs combine into a similar shape. His shell stays static and suspended while his limbs rotate at high speeds.
The holes in Galapagus' shell eject powerful winds, as well as the reverse, creating strong vacuums. He can use his winds to fly, blowing air to hover over a surface and using his rotating limbs as propellers.
Galapagus' wind blasts are powerful enough to put out fires and redirect objects.
Galapagus is strong enough to lift and throw a car. He also has superhuman durability when he is completely withdrawn into his shell.
Even though Galapagus has flippers rather than hands, he has enhanced dexterity as he can hold poles without fingers, as demonstrated by Terraspin.
Galapagus' arms become very sharp while spinning.
Galapagus is immune to poisonous gas.
He is also resistant to manna.

List of powers and abilities:
Aerokinesis
Fan Blade Formation
Aerokinetic Wind Blasts
Aerokinetic Redirection
Aerokinetic Suction
Tornado Generation
Sharp Blade Arms
Flight
Levitation
Enhanced Strength
Enhanced Durability
Enhanced Speed (via Flight)
Enhanced Dexterity
Poisonous Gas Immunity
Manna Resistance
Fire Suppression (via Aerokinesis)
Retractable Claws
Retractable Head
Retractable Limbs

Galapagus mentions that Ben's heroics are well known, even among his kind.
Galapagus has eight fingers but he doesn't use them much. They can be seen when Galapagus sends a distress call.
When Kevin used his Plumber Badge to translate Galapagus' speech, Galapagus mentioned Addwaitya, who controlled Legerdomain.
Galapagus does not know that Addwaitya is evil.
Galapagus is the only one of the prisoners who needed a translator to speak.
Unlike most of his species, Galapagus is capable of combat and is willing to lie to save his friends.

Galapagus is a Geochelone Aerio from the peaceful planet Aldabra