nyx, despite being the most malicious of my characters, has not killed anyone. she's not really a predator, and pokemon matches aren't that brutal.

she's probably shaved a few years off some people's lives, but, hey. a girl's got to eat, and she won't be directly responsible for any of their deaths.

carter has "almost certainly not caused any immediately fatal injuries," as her teacher puts it, which makes that answer a little bit fuzzy.

she has killed an entire basement full of rogue familiars, a flesh golem, several lab rats, and possibly one zoo creature of indeterminate species.

but none of those are people, so if you asked her, the answer would still be no

i don't think her powers spontaneously cause cancer