koaya, hakozaki serika, idolmaster, idolmaster million live!, idolmaster million live! theater days, hashtag-only commentary, highres, 1girl, ahoge, black tank top, black thighhighs, brown eyes, brown hair, character name, earrings, full body, grin, hands up, heart, heart earrings, jacket, jewelry, letterman jacket, long hair, long sleeves, looking at viewer, navel, necklace, official alternate costume, open clothes, open jacket, shoes, shorts, smile, sneakers, solo, sukajan gyarus (idolmaster), tank top, thighhighs, twintails, white shorts