Oooh boy. I’m going to take this and run with it, you watch. Possible gratuitous headcanon because I can’t always tell anymore.
So the nice(/horrible) thing about doing Brandir is that he has two primaries! No, I’m not going to argue that he’s a special snowflake. One of the really heart-breaking things for me about any version of the Narn, especially on rereads, is seeing it happen – Hufflepuff -> Burned Hufflepuff.
So when we first meet him, he’s not perfect, but this is the man who is author-described as ‘gentle’, who really dislikes hurting people, whose profession and calling is healing and herblore. This is the man who knew that the man who’d just been brought to him would cause Brandir’s own death and probably other horrible things and still gave him medical care because he was a human being. This is someone who helps everyone. Everyone is important, everyone is worthy of consideration, everyone deserves to be helped if they’re hurt – no matter what. His leadership decisions are based around keeping everyone safe, because non-warriors deserve to pursue their lives too and that means not living in the middle of a constant pitched battle.
And then… it goes badly. And it’s when the people he’s always helped, the people who, collectively, are what he values most highly, shut him out, that’s what burns him. It’s not about Niniel, or even directly about Turin. That was hard for him. It was horrible. It didn’t always bring out the best in him, either; sometimes he would get passive-aggressive and bitter, which is a negative Hufflepuff trait. But that isn’t what breaks him.
We actually see the moment where he gets ‘Burnt’, which if I understand correctly isn’t really typical. Everyone has ignored his advice over and over again, they’re all in danger, he’s suffering for his attempts to help people… and it’s not working because they won’t let him help them. And that’s when he snaps, and breaks his staff, and says, as I’ve put it before, “Fuck all y’all.”
This is clearly not a healthy thing. I mean, I would argue that it’s justified, but either way it’s not nice for him either. He collapses his circle down to him and Niniel, and while a Slytherin could do this in a healthy way – say, decide it was necessary for their mental or emotional health and be perfectly happy with a small circle – that’s not what happened. The decision was spurred by bitterness and anger and the breakdown of how his world was supposed to work. He was supposed to be able to help people – maybe it had to be at great cost to himself, but against that price he was supposed to be able to hold up a benefit to others and now there is none. He decides the best thing now is to care about one other person, and while the fact that he was in love with her probably had more to do with it than anything else, it’s worth noting that Niniel is the only person he can conceivably still help. Everyone else is refusing to take his advice; he’s useless to Turin’s party – but maybe he can help Niniel. He can find a way for the two of them to escape and live. That’s his explicit motivation.
It’s really heartbreaking to me, because in the end the only way he knows how to deal with not being able to help people is to force himself to stop caring about them. There was a lot of other emotional baggage there too, but that’s the core issue.
I’m inclined to say Hufflepuff secondary as well, although you could make a case for Ravenclaw considering we don’t have much canon about his working/learning habits. But I’m going to say Hufflepuff, not just because he slots perfectly into the ‘community builder’ role that secondary Hufflepuffs often take, but because he exhibits a lot of their failings as well. “Bitter and passive-aggressive doormat” is sortinghatchat’s description of a possible negative Hufflepuff Secondary, and while ‘doormat’ is over-strong, Brandir does demonstrate an extended –and, I think, deliberate – unwillingness to stand up for himself. At first it would have been part and parcel of suppressing his own needs for the sake of other people – and then it was because he was too disillusioned to feel it would make any difference. When he’s being stepped on, he does tend towards bitterness and passive-aggression, and I think it’s pretty clear that later on he is suppressing a lot of the emotional exhaustion – both the suppression and the exhaustion itself being hallmarks of the house in a bad situation.
I don’t want to sound overly negative about it, because the Hufflepuff Secondary was wonderful until… right about when Turin showed up. I’m pretty sure there was a better balance, and the amount of good he did with it before it started to sour was probably incredible. That’s what makes the souring, which leads up to the eventual Burning of his primary, that much more awful.
I will note that I think he probably had a Ravenclaw model he used essentially for Leader/Strategy Mode, but Brandir? Hufflepuff/Hufflepuff.