Ex-Death
The grand monarch of evil this side of the universe. He has the power to reverse the process of death and bring past villains to life, and he does so. He brings the 4 Sinistrals, Sephiroth, Kefka, Zeromus, Deus, Neclord, Ultimecia, and Chaos back to life, and they all work together to try and bring the Omega Rangers and the Earth Rangers down for good. In order for all the Ranger's missions to be a success, ExDeath MUST be eliminated, or else all the efforts are made in vain.
Sephiroth
ExDeath's second in command. He is very cold and heartless, and has loyalty to no one except for his master ExDeath. He commands the Turks, an elusive fighting team, who spy on the Omega Rangers and the Earth Rangers and bring back reports to him, saying what their next moves are, so that ExDeath can prepare for them. Sephiroth is a powerful fighter, and he is responsible for the death of Cloud's fiance Aeris, who Cloud is fighting for vengeance for.
Zemus
Second in command, and has control over Dave's best friend Kain, who will undoubtedly be a key factor in future battles to come.
Kefka
The Jester of ExDeath's court, but by no means a weakling. Although he is a jester, he is a powerful swordsman and magician, and leads ExDeath's army to go and conquer whole planets. No Ranger dare takes his clown appearance and his annoying laugh lightly. He is a force to reckon with.
Sinistrals--Gades, Amon, Erim, and Daos
These four are currently trying to stop the rangers from escaping the planet Lyrios. Can they stop them? Well, only time will tell. Daos is the leader of the bunch, and they are all ancient gods of evil. Being killed twice before in battles that spawned over 100 years, they refuse to be killed again, and they take their mission from ExDeath quite seriously.
Neclord
A vampire general who ExDeath uses. Incredibly skilled at magic, he is a force to reckon with, even for Celes and Terra. Everyone better watch their neck when Neclord enters into the scene.
Chaos
Kefka's top general, who is a skilled Commander and who is famous for conquering many planets. Interesting stuff may be happening with Chaos and Cloud in the future, so stay tuned to see what develops.