The "(ーー ;)" emote, also known as the "Worried Flat Eyes" emote, is typically used to convey a sense of worry, anxiety, or disappointment. The flat eyes and downturned mouth suggest a feeling of sadness or concern, while the horizontal lines above and below the eyes indicate a furrowed brow. It can be used in various contexts, such as expressing concern for someone else's well-being, disappointment in oneself, or general unease about a situation.