1 and 5 for Rovaaniik, 8 and 16 for Zev'rahni, 19 and 20 for Fayte!
Rovaaniik:
1. What is one thing others might find intolerable about them?
Hmm, there's probably a lot of his quirks that get on other's nerves. He purposely tries to be over optimistic most the time, and to some I know that gets annoying.
5. What is one thing they do that can negatively affect their relationship with friends?
When things aren't working out quite as he thought, he has a tendency to put a large distance between himself and others until he figures it out - this can be physically or mentally. You can see why it would kinda break a relationship with followers or those seen as his allies. It's usually not the ally that he's trying to get away from, however, but trying to look at things in an outside perspective which is easiest for him when he detaches from others and sometimes even himself - but Rovaaniik is not the best at communicating this, or really anything 'deep' to others.
Zev'rahni:
8. What mistake(s) do they continue to make/have not learned from?
Waiting too long to strike or make a move. He prides himself on his patience, but many see that it's also one of his bigger flaws. He hardly listens to them, even when he's faced with fixing an issue that wouldn't have happened if he just went for whatever it was.
16. Do they have any behaviors and/or beliefs that cannot be adequately justified?
He prefers to sleep on floors rather than in beds. There really is no reason, he just likes it better. Some could speculate that it's from his years with no home, growing up in a place where he never had a bed to himself anyway, or just because he finds it more comfortable. Zev'rahni really isn't sure himself!
Fayte:
19. Is there anything they refuse to budge on? What are they stubborn about?
If she sets her sights on a goal, she'll never let it go - even if it's pretty impossible, Fayte will mull on it for ages until she finds and answer, sometimes as far as going to call in favors from certain Daedric Princes (but that's fairly rare).
The other thing that's a bit more low-key she'll never budge on is getting married or sticking with a lover for the rest of her days. This is for many reasons, main one being she just thinks it would be impossible. One lover for hundreds of years? Pah.
20. What is a self-inflicted misery of theirs? (i.e. something they perpetuate themselves)
Feeling alone. Not just lonely, but feeling alone. She distances herself, never lets anyone quite get past her barriers, and hardly shares her beliefs unless it's directly asked. She feels alone a lot, but this is her own fault, and she'll never speak on it. It's not because of something that's happened either - Fayte has always been this way, her best friend Mercer is the only one who's seen inside Fayte's heart, but even then it had only been a glimpse. It's a deeper feeling than just not trusting anyone.
Thanks for asking! :D