Topsy is a grey Triceratops and Cera's father. Topsy is a short tempered dinosaur and very judgemental towards visitors who come to the Great Valley. Normally very grouchy and grumpy, his ideas for handling situations contrast that of Grandpa Longneck, who prefers getting through problems calmly. The two share leadership among the diverse species of dinosaurs in the valley. Despite his attitude, Topsy cares deeply for his daughter and approves of her friendship with Littlefoot and the others.
- Topsy met Pooh and his friends in Pooh's Adventures of The Land Before Time.
- Topsy met Kyle and Kaytlin in Kyle and Kaytlin's Adventures in The Land Before Time and will later meet the rest of the FT Squad in the later sequels. He'll also develop a bit of a rivalry with Future Time Travel Authority, Bruton.