Kaori is the son and youngest child of Samson and Natalie, the younger brother of Kaila, and the protagonist of The Tarbosaurus Guard. As the second-born child of the Tarbosaurus King, Kaori served as the leader of the Tarbosaurus Guard, a team of animals who protect the Mesozoic Lands and defend the Circle of Life. He was the fiercest member of the team before retiring and passing the role onto Vera (although he still has the Roar of the Elders). He is now married to Rita and has become King of the Tree of Life.