After her death, having both the right to succeed his foster father and the only mother he knew, Tygra grew to hate Lion-O and questions his decisions after he becomes the new Lord of the ThunderCats.
However, after she decided to show Jaga she had the patience by waiting in front of the Order's doors, during which Tygra helped her sustain herself and gave her a flower, he accepted her.
In the 2011 series, Jaga serves as head of Thundera's cleric warriors, possessing knowledge of ancient secrets and having the ability of superhuman speed as well as projecting lightning from his staff.
At the start of the series' second season, through Cheetara's powers it is revealed to Lion-O, who had been having a recurring dream of the final moments of Thundera's destruction, that there are more Thunderians living on Third Earth who survived the cataclysm and were rescued by a Ro-Bear Berbil scout ship.
He also possesses a "braille board", which allows him to translate information coming from sensor systems inside the Tower of Omens and see into the gloom of Dark Side.
After meeting Lion-O, she earns his trust and love, manipulating him into siding with him, while serving as a beacon for Mumm-Ra to regain the Sword of Plun-Darr and track the ThunderCats.
After repairing Ro-Bear-Bill following an attack by the Conqueror, who had been abducting Berbils and selling them as slaves, they help in constructing Panthro's new arms and upgrading the Thunder Tank.
They are the most culturally, artistically, and technologically advanced race on Third Earth, living in a democratic society in the treetop Bird Nation, as well as the sky city of Avista.
The following races were also featured throughout the series: Captain Bragg (voiced by Bob McFadden) is an intergalactic ringmaster and bounty hunter accompanied by the talking crow Crownan.
Mandora (voiced by Lynne Lipton in the original series, Erica Lindbeck in ThunderCats Roar) is an intergalactic police officer who works with law enforcers to protect the galaxy.
Mumm-Rana (voiced by Lynne Lipton in the original series, Kaitlyn Robrock in ThunderCats Roar) is an ancient sorceress and counterpart of Mumm-Ra.
The Snowman of Hook Mountain (voiced by Earl Hammond in the original series, Dave B. Mitchell in ThunderCats Roar) is a yeti-like knight and ruler of the Kingdom of the Snowmen.
Sondora (voiced by Gerrianne Raphael) is the Keeper of the Mystical Soundstones, who assists the ThunderCats when Vultureman steals one of her stones to create a sonic weapon for the Lunataks.
Turmagar (voiced by Earl Hammond) is the leader of the walrus-like Tuska Warriors, who live near the source of the river that serves as Third Earth's natural water supply.
Wizz-Ra (voiced by Larry Kenney) is a wizard from ancient Egypt who was banished to the 7th Dimension after losing a battle to Mumm-Ra, who framed him for damaging the face of the Great Sphinx.
During the ensuing battle with Mumm-Ra, Screwloose defeats him by taking the Sword of Plun-Darr and decides to stay on New Thundera to help Jagara maintain the gyroscope.
After the Ancient Spirits of Evil grow disappointed with Mumm-Ra's repeated failures, they demand that he destroys the ThunderCats; after he fails, they trap him within a planar crystal and cast him away from Third Earth.
They communicate with him through the cauldron and anthropomorphic statues of a boar, vulture, crocodile, and ox, as they cannot interact with the physical realm outside of the Black Pyramid except through avatars.
When Javan refused to honor his end of the pact, the Ancient Spirits bound the souls of the Tiger Clan to the living world as shape-shifting shadow monsters that obey their command.
The Mutants are the first villains to appear in the series, being long-time enemies of the Thunderians that originate from the planet Plun-Darr and unsuccessfully attempted to invade Thundera.
However, while four of the races obtained a stone that made them each a power, the other animals were outmatched by the Cats and pitted against each other until the Lizards managed to salvage lost technology and ransacked Thundera with help from Mumm-Ra and Grune.
Prior to his debut, Kaynar's race appeared in "Legacy", where a Jackalman named Shen (voiced by Rob Paulsen) assisted Leo and Panthera in overthrowing Mumm-Ra.
After ransacking Thundera, Slithe pursues Lion-O's group before overseeing the search for the Book of Omens and the Warstones, later disobeying Mumm-Ra's orders and attacks the Elephant village along with Grune.
Ratar-O buys the Thunderian survivors from the Lizards to use as slaves to find the Sword of Plun-Darr due to the curse Jaga placed on it, which kills those who attempt to retrieve it.
When the ThunderCats raid Mount Plun-Darr as Tygra and Cheetara pose as slaves to get the sword, Lion-O's group is captured by Mordax and turned over to Ratar-O.
When he arrives on Third Earth and gets Slithe, Jackalman, Monkian, and Vultureman on his side, Ratar-O fights the ThunderCats wielding the Sword of Omens, but they defeat him and throw it into outer space.
[23] However, his desire for power and greed led him to betray the ThunderCats and fight Jaga, who banished him into space; after his spacecraft landed on Third Earth, he terrorized its natives until he was defeated and sealed in a tomb.
Mumm-Ra later summons him to prevent Jaga's spirit from obtaining the Star of Thundera and freeing Pumyra, Ben-Gali, and Lynx-O from the Mutant prisons at Fire-Rock Mountain.
However, Grune intended to betray Mumm-Ra prior to leading the attack on the Elephants' village to obtain the spirit stone there, and Panthro traps him in the Astral Plane.
In ThunderCats Roar, Grune attempts to overthrow Claudus due to him being a bad ruler, but Jaga traps him in a crystal prison and ejects it into outer space.