Roxy

Roxy is the Fairy of Animals and Princess of Tir Nan Og. She was discovered by the Winx when the Wizards of the Black Circle re-entered magix to hunt her down.

History
As only daughter of Morgana, she is Princess of Tir Nan Og and the Earth Fairies. She, on the show, transformed when Gantlos hurt her dog, Artu and Roxy began crying, he replied with "Why are you crying? It's just a dog." She became enraged and let's just say, he probably regretted that.