alter sang, shu (arknights), arknights, commentary, english commentary, highres, mixed-language commentary, 1girl, :d, alternate costume, ankle socks, arm up, black sailor collar, black shoes, black skirt, blonde hair, blush, colored extremities, dragon girl, dragon horns, earrings, full body, green eyes, grey hair, hair between eyes, hand on own hip, horns, jewelry, long hair, looking at viewer, midriff peek, multicolored hair, navel, neckerchief, open mouth, pleated skirt, pointy ears, purple hair, red neckerchief, sailor collar, school uniform, serafuku, shadow, shirt, shoes, short sleeves, simple background, skirt, smile, socks, solo, standing, v, v over head, very long hair, white background, white shirt, white socks