Rinkus and Sierra are the secondary, later main antagonists in The Land Before Time Vll: The Stone of Cold Fire. They are Pterano's former henchmen.
Rinkus was voiced by Rob Palusen, who also voiced Strut in the second Land Before Time film and Sierra is voiced by Jim Cummings.
Rinkus is somewhat cowardly when Pterano gets angry with him. He was also rude to Petrie as he said to him it's none of his business, told to buzz off and then he knocked him.
Sierra is cruel, mean, angry, selfish, impatient, rude and sadistic.
- Rinkus and Sierra play a similar role to Ozzy and Strut, who are the antagonists of the first sequel of The Land Before Time as Sierra's personality is similar to Ozzy's and Rinkus' personality is similar to Strut's. In fact, Rinkus and Strut are both voiced by Rob Paulsen, however, Rinkus is worse than Strut.
- The Land Before Time VII: The Stone of Cold Fire is the second movie that has an antagonist who is voiced by Jim Cummings who betrays their boss, the first being The Lion King as Sierra betrayed Pterano in The Land Before Time VII: The Stone of Cold Fire and Ed betrayed Scar in The Lion King.
- Despite being Pterano's henchmen, Pterano reformed and Rinkus and Sierra didn't.