Ok so no one guessed who Bluemoon is related to yet. Anyway this is who she is related to. She is Darkstorm's lost older sister. So yes she is a night/seawing. Her egg was lost while her mother was flying through a storm over sea when escaping from some bandits. She was lost two years before Darkstorm hatched. She only finds her brother because she can sense her family. She can sense auras and auras are shared by families. She can see her aura and used that to find her brother. She was found by an old seawing who raised her outside the sea kingdom. She is also smaller than her little brother because of the fall into the sea.

Well what do u guys think? Like the lost sister idea? I looked back and saw I had no siblings in my oc book for Darkstorm so I changed it to no known siblings.