Aggregor is a power hungry Osmosian, a race on the brink of extinction, who has dedicated his life to mastering his abilities and achieving ultimate power. He studied the legends of Celestialsapiens and their reality-warping abilities, obsessed with absorbing one to rule the Universe. But in order to achieve this goal, he aims to absorb the full abilities of five unique aliens and complete the Map of Infinity, a complete map of space-time that will reveal the location of the Celestialsapien’s home, The Forge of Creation.

The specific aliens Aggregor chooses are an Orishan Burglar named Bivalvan, an Amperi detective named Ra’ad, a Talpaedan artist named Andreas, a Geochelone Aerio priest named Galapagus, and a Prypiatosian-B criminal named P’ andor.

Aggregor spent decades figuring out how to absorb a Celestialsapien without being killed by them (due to their omnipotence and multiple personalities). He eventually learned that a newborn Celestialsapien only has one personality, and thus can be absorbed safely. They’re only born every one billion years however so his timing needs to be right.

Aggregor is one of the last Osmosians in the Universe, due to most of them dying out from over-absorption and insanity. Once he achieves omnipotent power, he’ll bring back the Osmosian race and make them the dominant species of the Universe

The Map of Infinity is a complete map of space-time that extends across seventeen dimensions, including the Forge of Creation. This map was made by Professor Paradox to initially aid him on his travels of the Multiverse, but over time he grew beyond it.

Aggregor is the brother of the criminal Devin Levin, Kevin’s father.

Aggregor is one of Ben’s most dangerous foes. They meet when Ben is a teenager so whilst he is more powerful, Ben needs to be careful of fighting Aggregor due to his DNA absorption powers.

Unlike other Osmosians, Aggregor used a special machine to completely absorb the five aliens permanently, instead of partially gaining their powers for a short amount of time.

Aggregor is a cruel, sadistic, menacing, and arrogant sociopath, who does whatever it takes to achieve his goals, having no remorse for any of his actions. Unlike most of Ben's other enemies, Aggregor is more "hands-on" when fulfilling his schemes rather than relying on others. Additionally, Aggregor's power-hungry desires come from the desire of not letting others control him, relating to his goal to possess ultimate power in order to control the entire universe.