1girl animal_ears arknights bare_shoulders breasts cat_ears closed_mouth dress from_behind green_dress green_eyes green_hair highres holding holding_syringe jewelry kal'tsit_(arknights) long_hair long_sleeves looking_at_viewer looking_back medium_breasts mon3tr_(arknights) open_clothes ring see-through solo stethoscope syringe upper_body yuki_kawachi