When walking on grass, you have a 1/20 chance of summoning a fairy that is either green, blue, or pink.
Blue fairies are offensive, and attack enemies in the nearby vicinity; stunning them and dealing rapid DoT.
Green fairies are defensive, and deal thorns damage (1/3 of dealt damage) to enemies that attack you. When you are under 50% life, for every defensive fairy circling you, you gain 2 defense. There is no cap.
Pink fairies are healing, and regenerate the player's health passively. They regenerate more health when the player deals damage to enemies.