Person Frowning emoji represents a character, the gender of which is unimportant (still, in most cases, it’s a 👩 Woman), who looks either disappointed, helpless, or quite angry, depending on the emoji provider. For example, Samsung’s version looks frustrating, while Google’s version looks 😔 Sad. Just like in the case of all the other emojis, which express different emotions on different platforms, this one is used in the meaning, implied by its exact look. So, for example, Google users would use it for the meaning of being depressed. (Source: Emojis.wiki, Fair use)