Pisces Sun people are friendly, creative, talkative and can read others very well. You are probably a bit psychic and know when things will happen, or have inklings. You do need some time alone when you get overstimulated. This is a Sun sign that usually has a lot of interests, and accepts others for the way they are. Pisces is the last zodiac sign, so is the oldest soul, having understandings of life that others lack.
The Aquarius Moon rules your emotions. While Pisces usually will mold themselves for another, Aquarius gives you that nonconformist streak. Loves may be let in quickly and then be let go of just as fast. Your spirit is independent and you may not like to be tied down quite too tightly. You have a humanitarian streak and probably have pet causes or volunteer actively.
Libra rising is the way others see you before they get to know you well. Libras like to do things in partnerships, so this may make you more amenable to being half of a couple than the Aquarius Moon suggests. Libra rules the marriage house, and you are very romantic. This is a leadership sign as well, so you are a very self directed Pisces. This is a good thing, because Pisces can be a doormat for loved ones or let love keep them in an unhappy relationship, and Libra and Aquarius, two air signs, won't allow that. Libra helps you know your direction, so you have goals and enjoy your achievements.
These three positions are called your Trinity. All of the other planets in your astrology chart are in a zodiac sign too, so this is not your whole horoscope, only a small part of one. I think that the Moon and Rising sign erase the worst of the Pisces traits so you exhibit only the positive ones.