yui (niikyouzou), frostnova (arknights), arknights, official art, third-party source, 1girl, animal ears, boots, coat, dress, fingerless gloves, full body, gloves, hair ornament, hair over one eye, medium hair, official alternate costume, rabbit ears, rabbit girl, scar, scar on face, scar on nose, short dress, smile, thigh boots, transparent background, two-sided coat, two-sided fabric, white hair