erica hartmann, strike witches, world witches series, artist request, highres, official art, translation request, 1girl, 501st joint fighter wing (emblem), black jacket, black shoes, black socks, blonde hair, blue eyes, blush, chalkboard, chibi, classroom, dog girl, dog tail, door, full body, green skirt, gun, holding, holding gun, holding weapon, indoors, jacket, necktie, one eye closed, red necktie, school uniform, shirt, shoes, short hair, skirt, smile, socks, solo, standing, striker unit, striped clothes, striped skirt, tail, weapon, white shirt, window