So as u a fans all know, season 2 recently started and we met desna and eska. When I was watching it and we found out that desna and eskas, and korras fathers were brothers, that brought a thought to my mind.

 

are desna, eska, korra and their dads related to Yues family? I cant find an answer anywhere. So im bringing it to the forum.

 

Thoughts?

It's likely that they're descendants. But then again, since Yue died, a new family line may've started.

Question: Why did Korra want to open the portal thingy?

 

When one is attempting to get rid of spirits, closing portals is usually the way to go.

They might be.  Yue did become the moon spirit, but it is possible her parents had another child.  Or there could have been a brother (or sister, but knowing how sexist the NWT was I doubt it) that became chief.