The guardian of Krell is a massive insect-like creature of an unknown species living on planet Krell that protects the village of native residents from the Abomination, another monstrous creature. Every year, the natives of Krell cook a feast for the guardian, who usually eats a few of the villagers as well, so the guardian will continue to defend the village from the Abomination.
When the Voltron Paladins arrive seeking the Yalex for a Yalexian Pearl to pay off Coran's debt to Kythylian Mu, the team mistakes the guardian for the Yalex and battles it. This unfortunately ends in the guardian's death.
The guardian is bipedal and as tall as Voltron, with green outer shell armor that is strong enough to withstand the Mouth Cannons of the Voltron Lions and the saber of Voltron. It has four pairs of arms: two small pairs on its torso, one massive pair at its shoulders, and a final pair on its shoulder blades. Three pairs of its arms have large pincers, while the pair situated on its shoulder blades end in sickle blades. The guardian has two eyes, two horns on each side of its jaw, and prominent teeth strong enough to damage the armor of the Yellow Lion. In the end, it is only the guardian's own sickle blades that can pierce through its armor.
- The guardian species has only been seen once, and it is not known if more of it exist.