1girl aqua_eyes arknights bangs black_footwear black_jacket black_shorts blue_hair boots breasts demon_girl demon_horns demon_tail fetal_position full_body halo highres horns jacket jacknavy knee_boots long_hair long_sleeves looking_away looking_to_the_side medium_breasts mostima_(arknights) one_eye_closed open_clothes open_jacket shirt short_shorts shorts solo tail very_long_hair white_shirt