Milleous

Emperor Milleous is the Emperor of the Incursions; his first appearance is in X = Ben + 2. He has a daughter named Attea who overthrew him in X = Ben + 2 for a short while, and in the same episode he recovers his throne and send his daughter to the dungeon where her mother is. He appears to not care for life as he was willing to destroy Earth with all its people; he destroyed Pluto as an example of what he was going to do to Earth if his daughter was not returned safely, and was more than wiling to imprison his daughter after taking control back.

Due to his high rank, some aliens call him by his full title: Lord Emperor Milleous, ruler of the Incursion Empire, keeper of the conquest ray, all beings fear- (at or before this point the speaker is always cut off, implying a much longer title).

In Simian Says, he has received a DNA altering ray gun from Simian.