Rukus is a member of the Rhino Tribe.
Rukus is good friends with Runk.
Rukus was with Rogon and Runk in the episode Warrior Within, when they were forced to detuor by Gorzan. Rukus and his friends were not too happy.
Rukus was also seen in episode 4 Joy Ride, while play-fighting with his buddy Runk. He and Runk had to explain to Lagravis how Rhinos like to fight for fun as friends.
Rukus has the traditional Rhino blue kilt and black belt, just like Rhigor and Rogon. His horn has darker scratches on the tip, suggesting he has had some tough battles, or mabye just smashed a hard rock.