hiruyuririn, it was a joke! To anyone who has watch the series is obvious that they are friends.
I kind of forgot to put a "hahaha" after the coment, but is obviously a joke. Yunno is a friend and he is nice. Without him there wouldn't be NanoFate to begin with. People nowdays take things way to serious. Go all "you're a hater" just because a little thing. Again, it was a joke. A NanoFate joke. So lets all be friendly, but not in the White Devil style. XD
That aside, I really think is weird for Arf to work with him... she never was the studious kind and to me it makes more sense to her to be with Fate or her family...
Obviously, misunderstandings like this cause 300 wars. ^^ I'm sorry. I read too much into these things just because more often than not, these hostilities branch out until us NanoFate fans suffer in being generalized as whatnots. Let's get friendly, indeed. (Towards Yuuno, too, so as to avoid these circumstances)
But now that that's settled, I am pretty sure that Arf's reason for retiring as a Library assistant has got nothing to do with working with Yuuno but more with helping Fate with the research end of her Enforcer work. I forgot if it was in the Sound Stages or the A's Epilogue where it was mentioned, but that's the case. Moreover, Arf is with Fate's family. She helped around Lindy and kind of helped Amy in taking care of their children as well.
