The default costume of Nijisanji EN's Selen Tatsuki.
Her default costume consists of a black sweater with a race bib (often with a lanyard on), purple sweatpants, and untied black and purple sneakers. She also wears a black nail polish and a white shirt underneath her sweater. Due to her instability when transforming into a human form, she has asymmetrical arms, with her left arm retaining its dragon form (with a wristband and wrapped by bandages) and she has a large dragon tail.
This tag implicates selen_tatsuki (learn more).