X.A.N.A.

X.A.N.A. is the main enemy of the crew. He created all the monsters in lyoko.

Looks

Bad news. Howewer, X.A.N.A. was never shown in the cartoon. The picture is showing XANA's eye found on every Lyoko monster.

Now this eye may not be the image of the real XANA, but we heard somwhere XANA is actually the name of the evil program creating monsters

Personality

XANA is mean and he is the ruler of lyoko. He wants Aelita's mind. Scyphozoa is

one of XANA's monsters that is taking Aelita's mind.