| Friends of the Thundercats |
| Robear Berbils They are peaceful robot bears. They have many acres of orchards and farmland. They grow many different kinds of fruit, including candy fruit. They helped to build Cat's Lair and the Tower of Omens. They are sometimes attacked by the Mutants and/or the Lunatacs. The leader of the Berbils is Robear Bill and the only female is Robear Belle. |
| Willa Willa is the queen of the Treetop Kingdom. She is skilled with the bow and arrow. She knows how to navigate the woods. The first Thundercat she meets is Lion-O. She even helps the Thundercats when they are in trouble. She knows many things about Third Earth, especially things near The Tree-Top Kingdom, which is her domain and home of the Warrior Maidens. She is an excellent fighter and a wise ruler. She also very crafty, strong, and agile. |
| Nayda She is Willa's younger sister. She first encounters the Mutant, Monkian. He had tried to kidnap her for a servent for Castle Plun-Darr. But Willa attacked Monkian and he ran away. She is also a skilled archer and knows much about Third Earth. She is a very good fighter, strong, and agile, too, but not as much her sister. |
 |
 |
 |
| The Unicorn Keepers These two peaceful beings watch over the unicorn herd. They have at least some magical powers and know some about magical beings/places/things. They can understand the forest creatures. The Thundercats first encounters the female Unicorn keeper when Lion-O tried to cross the River of Despair and he encountered the Black Widow Shark. |
 |
| The Wallos These are small peaceful people who live in a small peaceful village. Because they are so peaceful, they usually get attacked by the Mutants and the Lunatacs (and a few others). The Thundercats always have to come save them. The Thundercats first encountered the Wallows when WilyKit and WilyKat were walking through the woods and saw a Wallow being robbed. |
 |
 |
| The Bolkins Poor peaceful people who have a knack for getting in trouble. Two of them accidentally released Grune, the Destroyer. |
| Snawman He is the ruler of Hook Mountain, which is completely covered with snow and ice. He can change ice into weapons (like axes) and has other limited snow/ice powers. He encounters the Thundercats when they went to his mountain to get the Thundera meteor. His faithful steed is known as Snowmeow, who ends up seeing Lion-O as a good guy when Snowman attacked Lion-O the first time but afterwards, becomes friends. |
 |