Behaviour.
Brathir is very rude, whilst he doesn't mean to be, the way his people act is very different to the way that people of Rohan or Gondor act, although strikingly similar to men of Bree, which explains his common friendships with Bree folk.
He often speaks his mind, and he can't stand rich men who flaunt their wealth. He often finds himself in trouble, especially when someone threatens his wife, Yegryn.

Backstory.
Growing up as a Lossoth was a tough life for Brathir, but also a rewarding one. His mother died from the harsh cold after childbirth, so he never knew her. His father was distant and rarely there, he grew up with hunters, learning to shoot arrows at the age of five. He built his snow home at the age of 10 and was considered a full Lossoth man, hunting for his kin. He used to trade using his pet mammoth, with his five wolves as his only company. By the age of 20 he was a very skilled bowman, though he would no longer trade, people relied on him for furs and food. He lived comfortably for 10 more years, and then he met 15 year old Yegryn at a party and after lots of talking he bedded her and took her as his wife the next morning.

Brathir and Yegryn built a snow home in the wild together, within eyesight of Suri-Kyla a big home with many rooms, and tents springing out of the sides, and a kennel for the wolves, (Who were now old and had three pups) They brewed their own ale infused with snow-berries, and would often throw wild parties.
For 5 years after they moved in, the Angmar forces had started to attack their camps, forcing Brathir and Yegryn to have to fight, though they managed to win enough so that they stopped attacking (with the exeption of small raids) they seek revenge and have sworn themselves enemies against Angmar.

Current story-
Now 30 years old, Brathir and Yegryn have travelled to Bree to try and raise money and men to fight against middle earth.
Whilst hunting one day, they caught a man (Deletor) in one of their traps, piercing his leg. After healing his wounds, Deletor took them to Bree, where they have settled for a while, to get used to the behaviour of the people around them.