Rinkus and Sierra

Rinkus and Sierra are the main antagonists of The Land Before Time VII: The Stone of Cold Fire. They are Pterano's former henchmen.

Rinkus is voiced by Rob Paulsen, who also voiced Strut from The Land Before Time II: The Great Valley Adventure and Sierra is voiced by Jim Cummings, who currently voices Kaa from The Jungle Book and also voices Scar (while singing) and Ed (although he does not talk, just laughs) from The Lion King, Steele from Balto, Nessus from Hercules and The Bears from Sing.

Rinkus' personality
Rinkus is cowardly, cruel, evil and sometimes angry.

He was also rude to Petrie when he told him that it is none of his business and then told him to buzz off.

Sierra's personality
Sierra is evil, angry, cruel, selfish, sadistic, rude, impatient and mean.

Trivia

 * Although they are Pterano's henchmen, Pterano reformed and Rinkus and Sierra didn't, so because of this, Rinkus and Sierra would be worse than their boss, Pterano.