![1girl animal_ears blue_sky blush brown_eyes brown_hair cat_ears cat_tail day flying gun holding holding_gun holding_sword holding_weapon kaneko_(novram58) katana long_sleeves neuroi nishizawa_yoshiko open_mouth pleated_skirt scarf school_uniform serafuku short_hair skirt sky smile solo striker_unit sword tail type_99_cannon weapon world_witches_series rating:s score:5 post #1912462](/cdn_image/preview/1e/ff/1effccf68c55327e497bd9fa64867539.jpg)
Mysterious entities in Strike Witches composed of black honeycomb structure material harvested from conquered territory. They come in various sizes; and are capable of self-sustained flight, rapid repair, and armed with directed energy weapons.
-excerpt from Wikipedia