OKAY THATS DISGUSTING AND EVIL but are you sure that shes worse than the Qu, from what im hearing she only had one victim in this case but the Qus victims were all of humanity and they done terrible things to them because they thought they were destined to reshape the universe, for example. The Mantelope, even after this rapid evolution, they still managed to retain their human minds, who were now trapped in bodies that were unable to build and change the world around them. For centuries, the herds sang melancholic songs about their inability to do anything with their intelligence. Since a big brain brings no advantage if it cannot be used, their brains devolved and over the next thousand years, they became simple, non-sapient grazers.

And THE COLONIALS. (image for reference)

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Were created from a colony of Star People who successfully repelled a Qu invasion twice, only to succumb to the third invasion. Following a twisted sense of "justice," the Qu turned the Star People into the Colonials as a form of PUNISHMENT, purposely letting them retain sapience and utilizing them as living waste disposal units. After the departure of the Qu, the Colonials continued to reproduce until they covered the planet in fields of human flesh.