2girls, arknights, astesia_(arknights), astesia_(starseeker)_(arknights), astgenne_(arknights), bird, black_dress, black_gloves, black_hair, black_shirt, black_thighhighs, blue_eyes, blue_sky, book, breasts, cleavage, cloud, cloudy_sky, day, dress, elbow_gloves, feet_out_of_frame, gloves, goggles, goggles_on_head, hair_intakes, hand_up, liliyfox, long_hair, looking_away, looking_to_the_side, medium_breasts, multiple_girls, open_book, outdoors, parted_lips, shirt, siblings, sisters, skirt, sky, standing, swallow_(bird), thighhighs, very_long_hair, white_skirt