Question: Did this 'Vesuvius' person ever get the go-ahead?
Alright, question. Would solving any of these problems help at all to make addressing issues less severe?
Lyn~ From your last post my impression was that Alaira didn't understand that Lyn thought she hurt Alaira, merely that she felt it was her fault, which means she can't explain what happened completely with signs. You can only say so much with signs. Maybe Ssarak could possibly help with that as he could translate Lyn's thoughts to words to what exactly she is thinking then help fill the gaps. Lyn can understand if she's told what actually hurt Alaira instead just told it's not her fault. She needs something else to explain why Alaira reacted like that because without that, the only reason Lyn can come up with is her self.
Sickness~ If this is blood sickness, this will go away by morning as long as she doesn't use anymore magic. It just means her arcanite is low and needs recharge which as time goes on, it will replenish itself. So a time skip to morning will be helpful in eliminating that though I suggest she takes it easy on the magic some. :P
Tried & Angry~ Tired will also be gone by morning as nothing happens farther and the fact there's a fire will help. As for Angry, best Lyn can do is try to snuggle and cuddle Alaira to make her less moody before the chat with the other two. Also, would keeping Lyn where Alaira could see her help in soothing over Alaira's anger over the chat?
Perhaps that is the case, but you also have to consider the perspective of the others. She acted rashly and nearly got them all killed at the first bridge. Afterwards, Meirin and Darius confronted her, and she had a long conversation with Meirin about the problem and how to get past it. Then, at the second bridge, she forgot everything they had talked about and did the exact same thing again, endangering everyone's lives once more. To the others, she has proven herself untrustworthy to make good decisions. In Ssarak's eyes at least, Alaira either does not care if she endangers Lyn, or she doesn't understand how her actions could hurt her. Ssarak is a patient person, but even he won't be cordial after she has endangered them all for a second time. It just wouldn't make sense IC for him to be patient with her when patience has been proven ineffective. In Ssarak's eyes, Alaira is not going to stop putting them in danger, so he needs to act sooner rather than later.