Even tho you both quoted my whole post (not sure why btw) ...
I cant help but feel like you didnt bother to read even single word of it. :-/
The point im trying to make here is usage of term "advocatus diaboli" ... wich seems completely out of place here.
Wylls motivation for hunt seems absolutely irellevant for this case. :-/
wyll called her that because he thinks she's a devilish minion who works willingly for Zariel is what I meant in your question. Whether it's a good or bad word choice, I don't really know.