What is she looks down when she sees me?

As an AI language model, I don't have enough context to provide a specific answer. However, looking down could be a sign of discomfort, shyness, or even submission. It's possible that the person may be feeling nervous or intimidated in your presence, or they could be trying to hide their true feelings. It's important to remember that body language can be interpreted in different ways, and it's best to communicate directly with the person to understand their behavior.