Growing up, Enzo always wished that the golden beaches he talked about with the various vendor food and fun atmosphere was that of Italy somewhere, Sicily maybe. In actuality, those beaches were those of Los Angeles. Not as glamorous, but at lest they were beaches.
Enzo's story begins with Victoria, an Italian-American daughter of a mob boss. The crime family she was born into wasn't too big, but big enough for the local police force to target them and for people to assume the worse in her. That got her down growing up - people always equated her to her father and sharing his views whereas, in actuality, she was the polar opposite. Victoria was a soft-spoken girl who rarely had anything bad to say about anyone and thus, being avoided like the plague, made things hard for her. She became secluded and rarely spoke to anyone.
Palaemon brought out a side of Victoria though, one that nobody had seen. When they met, he was the only one who didn't avoid her like she was a disease and, slowly, he made Victoria more confident. There was never any secret about who he was; in exchange for Victoria opening up about her darkest feelings, ones she didn't even let herself wholly explore, Palaemon told her who he was. He gave her a choice, really. He could either leave her with nothing and that would be that, or he could give her a child. Victoria loved Palaemon, albeit more platonically than romantically, but she took the chance to have a child, fearing that no other man would give her a chance like he had. So, they did the deed and by the next day, Victoria was carrying a child.
Whilst her father wasn't the most pleased when she told him the news, he didn't shun her and instead promised her protection in exchange that, the child she had, would grow up to assist the family in some shape or form. Truthfully, Victoria didn't want that for her child but she knew protection was crucial and thus made the deal. And, nine months later, a bouncing baby boy was born whom she named Enzo.
Enzo definitely took a liking to the beach and grew up as a very bouncy and bubbly boy. His mother thrived, really, after having him. She forced herself to become more confident for his sake and found out that people did like her and saw her beyond her father. To cement it, with her father's permission, she changed her's and Enzo's last name to 'di Rosa' in hopes to continue the trend.
When Enzo was young he and his mother moved to Brooklyn following her family's relocation to the east coast. Neither he or his mother particularly wanted to go, but Victoria knew how valuable the protection was and didn't want to chance it - that and she was painfully aware of the promise she had made and knew, in the long run, it'd be harder to let Enzo go to the east coast on his own and thus she decided to just bite the bullet and move whilst he was still young. Enzo was still always the bouncy bubbly boy he had been back in LA, but there was a definite pining for the warmer weather and his mother couldn't help but feel bad for him.
Here's the thing about Enzo's monster attacks - he never actually experienced them. No, he wasn't exempt from them, just protected heavily. Victoria had told her father about Enzo's heritage when they moved to Brooklyn and, specifically preparing it so his grandson would get the protection that he was promised, his grandfather rounded up only the best demigod protectors. So, the years rolled by Enzo managed to dodge attack after attack as the demigod protectors took care of it for him. He did have training, however, but he always thought it was so he could defend himself against other kids his age, not monsters.
When he became big enough physically and muscular wise, Enzo became a deterrent for his grandfather's crime family. He never participated in any of the crimes themselves - his mother had made sure of that - but he was used as a threat. None of the threats ever carried out to which Enzo was thankful for; he didn't like to hurt things unless they truly had to be. He did that for a few years before being told of Camp and, promptly, going under his mother's influence.