The Night Ones are a variant of Elves (Homo sapiens nobilis), with a natural coat of short fur on their entire body. The fur color varies from black to orange. Most night ones have dark skin in black and brown tones. All Night Ones have a light allergy against sunlight.
The resulting mainly nocturnal lifestyle combined with the usually dark skin/fur color leads to Night Ones being called "Dark Elves" in many places (other nicknames include "Furries" and "Plushies").