A female Rhino who stows away on Rogon’s massive Rhino truck, Rinona is initially dismissed by the gang but comes to play a valuable role in their missions. Unlike the simple-minded males in the Rhino Tribe, female Rhinos are unusually competent.The highly-intelligent Rinona claims she is there to keep the “rockheaded” Rogon safe because he is “special” to her. Eris jealously interprets this to mean that Rinona is Rogon’s girlfriend.The two smart girls are constantly vying for dimwitted Rogon’s attention. After many tense encounters between the two, we ultimately learn Rogon is “special” to Rinona because he is her brother. Eris and Rinona finally stop their rivalry and become the best of friends.