People born on March 20 are Pisces. Pisces girls are 100% feminine. They are gentle, sentimental, and feminine, so they also have feminine emotions that bother them.
She needs a sense of security and protection; they are mystics, and their secrets are likely to be more than the number of your friends, but her clever mind always knows how to hide secrets.
So, you have to grasp it well. As for what gift to give her? Since they are gentle people, they must like romantic gifts. Give her some crystal jewelry, I believe she will like it.
Or you can give her personalized chocolate, which can be written on it. Write what you want to say to her on it and let her feel your heart. It is a very good choice. I hope it can help you.