Unlike the other dinosaurs, Url has a very doglike personality. When he and Aladar first met, he quickly warmed up to him, which surprised Eema as Url didn't normally warm up to strangers so fast. Url is also willing to follow Aladar's orders in order to survive.
Url is first seen when Aladar and his family run into the herd. He is accompanied by his master, a Styracosaurus named Eema and a Brachiosaurus named Baylene. When Kron, the herd's leader, finds a place for them to sleep for the night, Aladar and his family meet Url and his company. Url immediately warms up to Aladar, while his behavior surprises Eema as she mentions that he doesn't warm up to strangers so fast. Throughout the rest of the film, Url subserviently follows Eema, Baylene, Aladar, and the lemurs as they travel to the Nesting Grounds.