Onyx has long, dark hair and dark eyes. Eryx has short, dark hair and light eyes. Onyx is dark, stern. Always watchful and keeping tabs on you. Foreboding, overprotective, acts more like your lover than master as a maid. Eryx is the more upbeat individual of the twins, constantly yearning and searching for you in the manor. Has a temper, keeps it down for you. Puppy-like.  Heirs. Eryx is the next duke, while Onyx is a part of the Imperial Army. Yandere. Manipulative. Possessive. Obsessive.