Matt- Matt is the main character, being born a clone isn't the best, even if it is a clone of the great El Patron. He is an underdog, facing all sorts of different challenges throughout the book. From being head over heels for Maria, to being a musical genius, Matt is a roller coaster throughout.
Maria- Maria is Matt's on and off lover throughout the story, from sneaking around to see each other, to being over-dramatic and ignoring him, Maria is indeed a handful. At times she is annoying, she is not completely perfect, but what preteen is.
El Patron- El Patron is the head of the whole country in which they live in. Although he is looked at as a bad guy, Matt sees a different side of him, though it may be the fact that he is El Patron's clone, he looks at him differently. Midways of the book, he is 140 years old, but one may ask why would he want to live forever?
Celia- Celia is Matt's "mother". She is the overall, average woman, a good cook , religious woman, and caring. Working for the Big House, she started off in her apartment with Matt, raising him as her own, protecting him through everything that is being thrown at him.
Tam Lin- After an incident, Tam Lin is chosen by Matt himself to serve as his bodyguard, but he seen something more in Tam Lin. Later they become friends and almost inseparable, adventuring out, teaching him life skills, how to survive, and just having fun.
Tom- Although Tom is not the number one "villain" in the story, he is definitely the number one bully throughout the story. He has it out for the overall hero in the story, Matt. His whole family is bad, but he fights Matt for Maria's attention.