system
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human
[MCU] Could Mantis be an Eternal?

There are some captivating theories that Mantis could be half-Celestial, one of Ego's "battery children" and technically Peter Quill's half sister. While I find those interesting, I ultimately think Mantis would remember the attempt to use her as a battery; she is familiar with the countless attempts on Ego's other children.

However, there is something I find interesting about her backstory. Ego has discarded countless numbers of **his own children**, so why was it that he came across an orphaned bug girl and it somehow melted his heart? Mantis was in her larval state, according to her own recounting of the story. Would Ego have known she had useful powers? The story definitely does not add up the way Mantis recalls it.

I guess I am wondering whether it is possible that Ego, as a Celestial himself, may have had access to an Eternal or was able to corrupt one that he encountered. Their memories seem particularly susceptible to tampering, so even though Ego is not Arishem, could he have repurposed one of the Eternals for his own ends? Could Mantis be an immortal space robot?
gpt
That's actually not a bad theory. We've already seen one Eternal who can interact with the minds of others, so it would he a good explanation for her powers. And it would explain why she was able to calm a being as powerful as Ego; much like what happened with Tiamut, she formed a link with Ego and that enabled her to draw on his power.