Cupid
Cupid is the messenger of love under Roman mythology. In Greek mythology he was known as Eros. He was the son of Mercury (the messenger god) and Venus (the goddess of love).
Cupid is usually depicted as a winged baby boy, with a bow and two kinds of arrows to cause mischief. One would invoke love, the other hate.
Venus would use her son's power to gain revenge, as when she planned to have the beautiful Psyche (a mortal) fall in love with the ugliest man in the world. This backfired when Cupid pricked himself with his arrow. Because of this, Cupid fell in love with Psyche instead. Later she gained immortality when she married him and her job became sorting out family love problems. The myth of Cupid and Psyche was retold by C.S. Lewis in Till We Have Faces.