The relationship could develop through shared experiences. For example, they could go on a hunting trip together. During this trip, they learn about each other's hunting styles and preferences. This shared activity can break the ice and start to build a bond.
I don't have enough information to say for sure. It could be fiction, or it could have roots in reality that have been adapted or exaggerated for a particular purpose.
They're popular because it combines two interesting groups. Bella is a well - known character, and the Denali sisters add a new dimension. It allows for unique storylines.
The story of Anger Sierra might focus on Sierra's battles with her own anger, how it shapes her personality and the challenges she faces because of it. It could also involve her growth and transformation in dealing with this emotion.
I don't believe it's true. Most of the time, when a story has a name like that, it's made up to capture our interest and take us on a fictional journey rather than being rooted in reality.