Cera is a friend of Littlefoot in The Land Before Time film series. She is a Triceratops. Cera has brothers and sisters, who were seen briefly in The Land Before Time, and has a nephew, which is Dana (voiced by Nancy Cartwright, who also voices Bart Simpson in The Simpsons), and a niece, which is Dinah (voiced by Sandy Fox). Dinah and Dana made their appearances and were seen in The Land Before Time VI: The Secret of Saurus Rock. Technically they are actually her cousins as mentioned by her father.