The main Lyoko warriors in the Code Lyoko TV series were Ulrich, Odd, Yumi, and Aelita. But the Lyoko warriors in the present day are different. The Lyoko Warriors fight against X.A.N.A. the evil entity that wants to take over Lyoko and the real world.
Derek: The leader
Enzo Matrix: Assistant to Derek and a good fighter
Eight: Derek's pet octopus who fights sometimes.
Little Enzo: Eight's twin brother and the pet octopus of Enzo Matrix.