Persephone is the goddess of many things. The main being spring, reincarnation, ghosts, and fertility. Her being the goddess of spring allows her to grow plants whenever she pleased. Due to being so skilled with that power, she's able to turn animals and people into plants, though she only does it if anyone makes her angry. She guides souls to the underworld, making sure they have a smooth travel to it (for those who deserve it). To those who don't deserve it, she is often vengeful and cruel.