1boy, 1girl, arknights, back-to-back, black_background, black_jacket, black_tank_top, blue_scarf, breasts, cleavage, coat, demon_boy, demon_girl, demon_horns, gradient_background, hammer, holding, holding_hammer, holding_pen, horns, infection_monitor_(arknights), jacket, large_breasts, letterboxed, light_purple_hair, logos_(arknights), long_hair, looking_at_viewer, mao_(expuella), mudrock_(arknights), nib_pen_(object), off_shoulder, open_clothes, open_coat, oripathy_lesion_(arknights), pen, pointy_ears, red_eyes, scarf, serious, short_hair, simple_background, tank_top, white_coat, white_hair