Blue Fang knew he tended to find naturally coloured wolves, but it would be cool if he could find a wolf with a much more exciting pallet. That's where Auburn comes in. He picked up her scent from her heat and knew he needed her to join his pack. Given the fact she was the smartest and wisest wolf in the pack, Blue made her the herbalist. After his relationship with Luna went south, he decided to spend more time with Auburn. She might be his favourite and has set a grave right next to his when they do pass on to the other world.
Their friendship eventually formed a pair bond with each other where they adopted 1 male puppy. She's also highly skilled in herbalism.