These next six carry the show to perfection imo. This next one is lots of people's favorite.
#6: GUZM脕N
Portrayed by Miguel Bernardeau
I liked Guzman from the start because I love the "messy rich boy" archetype, but most people started off hating him. He's a total fuckboy and asshole at the beginning of the series.
However... Guzman completely flips his stereotype on its head. He begins dating the bitchy, stuck-up rich girl and is a snobby, popular alpha male that bullies Samuel, Nadia, & Christian. But he slowly becomes way more genuine and down to earth than everyone else around him. He truly cares for his sister, Marina; he calls out his corrupt parents on their bullshit; he's the first person to comfort Ander when his sexuality gets exposed; and he ends up being Nadia's best friend, and later, her lover boy!
Despite being an asshole sometimes, he's super loyal and protective of the people he cares about and he's been through some of the worst shit on the show. An amazing character.