Runk is a strong Rhino who is good friends with Rukus.
Later, when Lagravis visits the Rhinos in Joy Ride, Runk becomes mad at Lagravis for breaking up his play-fight, explaining that he only fights when he's happy.
Runk appears in the Dismal Bog's dungeon, alongside Rukus, guarding Reegull's cage. He and the other Rhinos were recruited by the Crocs. Runk carries a blaster called the Rock Lobber.
Runk has a dark grey horn that is apparently a nailed on replacement for a lost horn. He wears a blue kilt, but lacks the large black belt of most other Rhinos.