So it's fine for monsters to kill any outsider they want, even if the victim is an outsider too?

[She closes her eyes.]

...ha. Even if this place is bigger and nicer... no. No. They're not like the spider, I shouldn't even think that. They can't... they can't possibly be that cruel and selfish. That's not fair.

[That was more a self-pleading murmur, so she takes a breath and shakes herself out of that funk, raising her voice once more.]

They set out the terms at the start of the trial. If they break those, then anything else they've said loses its worth, too. Including their insistence that only humans can kill monsters.