You can kill Bibius and Junius doesn't react. No dialogue is initiated if you go up to him after.
See above; I'd already stated that dialogue doesn't start, it's the quest trigger I was looking for. Which
does trigger if Junius is killed after Bibius, but not if Bibius survives him. Hint:
there is no us and this isn't a pissing match.
Far more interesting is that it seems no-one has set 'team tags' for these early NPCs,
unlike the Black Cove fight, which is why I mentioned it. Likewise, the guards on the beach don't seem to protect each other,
which is a little broken. But yes, your earlier report made me investigate this a little more closely.
[Edit]
Attacking Arnu leads to combat being initiated instantly, and a hilariously short fight - interestingly, legionaries in range also join the fight correctly. So, his flags are set correctly and they're allied.
230 damage x4 ... which means that certain NPCs are set to "God-like" levels, preventing them being killed off. A bit cheesy but hey