Nox is a huge and powerful ink black dragon with red eyes. She is the "evil" sister of Lux.
Nox is a dragon of Hyrule. Her English name is "Dark", or "Night." Her story is told in many areas of Hyrule, oral and written. Her sister, Lux, is a dragon of good. There story is about how they keep the balance between each-other and everything around them.
She and her sister have been seen in Link's dreams once he was freed from the Fierce Deity's mask.