Prince Lotor is the evil son of the Drule King Zarkon. He dislikes his father greatly, and wishes to rule in his place with Princess Allura by his side, to whom he has developed a strong and obsessive attraction. Like some supervillains who follow the cliche-but-adorable idea of a villain falling for a beautiful girl, Lotor is often shown commenting on how good a Queen she would be or how beautiful she is. So powerful is his attachment that he is unable even to destroy a holographic image of Allura. Lotor also has an even stronger hatred with Keith, because he's seen Allura's love towards Keith. Because of Allura and Keith's love, Lotor is more determined to kill Keith than any other Voltron Force member. Lotor is a very sly, smart, smooth, powerful man, who exudes force and emanates what seems to be pure evil, except when Allura is around. In GoLion, Sincline's obsession with Farla occurs because she resembles his mother, whom Emperor Daibazaal (a.k.a. King Zarkon) had killed for refusing to marry him after Lotor was born, with Princess Farla/Allura becoming his major psychological weakness. This is basically an Oedipus complex. Lotor was killed in the last episode of GoLion, something that is typical for super-robot shows. Lotor was voiced by Lennie Weinrib. In Voltron: The Third Dimension, Lotor was mortally wounded in a battle, and was converted into a cyborg after he was placed in prison. However, he escaped and perpetrated his revenge on the heroes, though he still has feelings for Allura.

 

Princess Allura of the planet Arus is the ruler of the Kingdom of Altair (as well as of the entire planet, for the most part) and is also the object of Lotor's affections. She takes over for Sven as the pilot of the Blue Lion that forms Voltron's right leg. Allura wears a pink uniform in the original series, and a metallic blue uniform in Voltron: The Third Dimension. Though a bit naïve, especially with matters of romance, Allura is a strong-willed person, and is very capable of ruling her planet, though some like Coran and Nanny tend to doubt this ability. She is capable of invoking the dead, particularly her father, the late King Alfor. In The Third Dimension, Allura later learns special mind skills that could allow the Voltron Force to control the Lions without having to be in the cockpits, and also helps the others to learn it as well. She also has feelings for Keith.

Hunk is the strong-man of the group, piloting the Yellow Lion that forms Voltron's left leg. He is shown wearing an orange uniform in the original series, and a metallic yellow uniform in Voltron: The Third Dimension. He may look tough and mean, but has a soft heart, especially when it comes to children. He is never late for a meal. Though his friends tease him about his appetite, most of Hunk's bulk is muscle.

Commander Keith, leader of the Voltron Force, who pilots the Black Lion that forms the bulk of Voltron. Keith wears a red uniform in the original series, and a black uniform in Voltron: The Third Dimension. Keith is a quiet individual who spends much of his time pondering his decisions, thinking up new strategies, and simply being a leader. He also has a hobby of reading books. He can often be found doing so either in the pilot's lounge, or in his room. He seemingly cherishes Princess Allura and is thought to be somewhat protective of her; his worst fear, according to Voltron: The Third Dimension, was that she would be forced to marry the evil Prince Lotor.

Lance, Second-in-command of Voltron pilots the Red Lion that forms the right arm of Voltron. Lance wears a blue uniform in the original series, and a metallic red uniform in Voltron: The Third Dimension. He is a tall man, both wiry and wily, Lance is always cracking jokes and teasing others whenever he gets the chance. He is the only one in the group who contests any of Keith's commands. He is a ladies' man and a great pilot, though reckless at times.

Haggar the Witch is the one responsible for creating all of the Robeasts (or Galran Beast Fighters) Voltron must destroy. She is notorious for using her dark magic to cast hypnotizing spells over people. Though she was once good and beautiful, she is now evil and ugly. It was Haggar who was responsible for originally splitting Voltron into five components in the American version. In the Japanese version, she was one of Daibazaal's old love interests, and possibly a concubine. Haggar's voice was played by B.J. Ward (US) & Masako Nozawa (Japan). In Voltron: The Third Dimension, Haggar went into hiding after the final battle, but rejoined Lotor in his conquest schemes. They strike a deal in which, if Lotor conquers the universe, she gets the magic of the lions while he gets the universe and the lions themselves.[

King Zarkon of the Planet Doom is one of the rulers of the Drule Empire, though by no means the absolute ruler. He is constantly using others as scapegoats for his own failures (à la Zanbazir using Prince Heinel as a scapegoat), including his son Lotor. In the Japanese version, however, he is the evil ruler of his own Empire, without anybody controlling him. This differs from the American version, where he is a king with a Senate advisory body, with none daring to oppose him; very similar to Voltes V 's Emperor Zanbazir in his treatment of slaves (ex. whipping, starving, killing them on the spot, which is typical in super-robot shows). In the Japanese version, his character was eventually killed by GoLion. Zarkon was voiced by Jack Angel (US) & Kousei Tomita (Japan). In Voltron: The Third Dimension, Zarkon managed to redeem himself prior to his final defeat, and became a member of the Galactic Council. His redemption, however, was a ruse by which he and his son worked together to take over the alliance.