Tsumugi's official halloween costume in Princess Connect!.
She has purple eyes, large breasts, and long pink hair stylized in twintails with sidelocks. She dresses as vampire wearing a tilted black mini top hat, black hairband, two-side black & red cape, collared white shirt with puffy long sleeves, black corset, black frilled skirt, bat ornament, and a red ascot.
This tag implicates tsumugi_(princess_connect!) (learn more).