Devon’s species, Vi, tend to remain solitary and feral, and don’t form long-term collaborative societies often. They also tend to be pretty okay with eating other Vi/sentient species - although they usually stick to plants and little, easy to catch animals. Devon’s a lot bigger than most Vi, though, and needs a lot more food to sustain his active lifestyle; he has probably hunted and eaten another more than once.
Incidentally, Devon did come from an organized society of Vi and can actually do things like create complex tools and speak a language past the basic sign-based communication Vi innately develop.
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