If there was a villain or just antagonistic character who was a Celestialsapien (in this case a member of the species, not a transformation of the Omnitrix), how would you write him?

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Omnitrix, Ben 10 Wiki

Minor Transformations - Omnipedia

Ben 10 Quest

Minor Transformations - Omnipedia

Omnitrix, Ben 10 Wiki

What would happen if Kevin Levin from Ben 10 absorbed the Nemetrix? - Quora

Why didn't the Omnitrix turn Ben 10 into Alien X when the universe exploded in his face? - Quora

Ben 10 Quest

Omnitrix, Ben 10 Wiki

The Immaturity of Thomas Astruc — About your ask where you mentioned Kevin in Ben

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Why didn't the Omnitrix turn Ben 10 into Alien X when the universe exploded in his face? - Quora

Ben 10: Supporting Characters / Characters - TV Tropes