The meaning of a purple emoji sent by an American girl would depend on the specific emoji being used. Purple is a color that can convey various emotions or concepts, depending on the context.
Here are a few possibilities:
Purple heart emoji: The purple heart emoji is often used to represent love or affection. It can also be used to show support for a cause or to express sympathy.
Grapes emoji: The grapes emoji can be used to represent fruit or wine. It could also be used to symbolize something that is going well or to express a celebratory mood.
Eggplant emoji: The eggplant emoji is often used to represent something phallic or sexually suggestive. However, it can also be used in a more lighthearted way to represent food or cooking.
Ultimately, the meaning of the purple emoji would depend on the context of the conversation and the specific emoji being used. It's always a good idea to consider the overall tone of the conversation and any other messages or emojis that have been exchanged before trying to interpret the meaning of a single emoji.