1boy, 1girl, animal_ear_fluff, animal_ears, arknights, arm_rest, barefoot, beard, black_jacket, book, bookshelf, cat_ears, collared_shirt, cup, doctor_(arknights), english_text, facial_hair, green_eyes, green_hair, green_shirt, grey_hair, guin_guin, holding, holding_book, holding_cup, hood, hooded_coat, jacket, kal'tsit_(arknights), leg_up, long_sleeves, male_doctor_(arknights), no_pants, no_shoes, old_man_(guin_guin), shirt, sitting