Nauplius is a religious fanatic and an opportunist. He really will take whatever opening (or “excuse”) is on offer. (He’s also a somewhat intermittent visitor here I think.)
Arrendis is a predator, and this forum is prime habitat for her, or maybe just a hunting ground. She doesn’t really need to look for excuses, just prey, which is abundant. If you cross her path with a not-tear-resistant bit of neck or flank exposed, that’s typically opportunity enough.
A slaver hound won’t apologize or try to excuse or explain away the fact that it’s eating you. Neither will Arrendis. She was peckish, and it’s not her fault if you’re tasty and easy to catch.