Sirius

Leader of Dusk Sun Down!

She was born to an Umbreon and one of the last Ursaluna in a fox clan. (Eevees/nickits/zoruas/ect)

Eventually left to start her own life. Joined DM, dated Aster, then upon learning her plans to basically purge Aerie she tried to leave which resulted in them fighting. Sirius was injured pretty bad, her neck slashed. Kaz came to her rescue and led her away. 

She founded DSD solely off her desire to tear DM down and kill Aster before she could cause any more trouble. 

During the last battle, she.. wasn't herself anymore.