1girl bangs black_hair black_neckwear blunt_bangs blush braid breasts green_serafuku green_skirt grey_background kantai_collection kitakami_(kancolle) long_hair long_sleeves medium_breasts midriff mofu_namako navel open_mouth pleated_skirt purple_eyes sailor_collar school_uniform serafuku sidelocks simple_background single_braid skirt solo