kal'tsit (arknights), arknights, commentary, highres, 1girl, aduki (zrpw7545), animal ear fluff, animal ears, bare shoulders, cat ears, cat girl, closed mouth, dress, fingernails, green eyes, greyscale, halter dress, halterneck, holding, holding pen, looking at viewer, medium hair, monochrome, off shoulder, pen, simple background, solo, stethoscope, stethoscope around neck, upper body, white background