Camilo

Conrad's good friend who betrayed him by giving information regarding the Capulets' hideout to the Montagues. He is later found by Juliet, Francisco, and Curio to be in luxurious housing alongside a disgruntled Tybalt, whom he helped to raise. After being threatened by the latter, he flees from his mansion. Camilo's name is likely a nod to the character from The Winter's Tale, a character who defected from his liege King Leontes after Camilo was ordered to kill King Polixenes. From wikipedia