Sovereign

The Sovereign are the four most powerful Mega Digimon residing in the digital world. Their domain is the Land of the Sovereign. Zhuqiaomon tried to destroy the humans, believing them to be a threat to Digimon and the digital world, but was the only Sovereign who felt this way. While Azulongmon convinced him to put aside his vendetta, Baihumon fought the D-Reaper while Ebonwumon watched.
 * Azulongmon - The Sovereign of the east, resembling a snakelike dragon with a blue aura
 * Zhuqiaomon - The Sovereign of the south, resembling a phoenix or turkey with a red aura
 * Ebonwumon - The Sovereign of the north, resembling a two-headed turtle with a green aura
 * Baihumon - The Sovereign of the west, resembling a white tiger with a white aura

The Sovereign led all the Digimon of the digital world, in Mega form, to fight the D-Reaper. It is unknown how many survived the battle, as the only ones confirmed to survive after a week are the Sovereign; they pulled Cable Reaper through the portal into the digital world.