The series' title character, a 12 year old who's spontaneous, energetic, restless and adventurous. A good intentioned kid who always gets into trouble, usually because trouble always finds him.
- Cheerful Child: Is quite the optimist, even during tough and dangerous situations.
- Cloud Cuckoolander: Has quite the wild mindset.
- The Ditz: He usually doesn't do very well in school. And usually never notices the trouble he gets himself into.
- Nice Guy: A bit lively, perhaps, but he usually means well.
Elvis's best friend. He's a compulsive reader of scientific, educational and historical books and he's also a big fan of Bollywood musicals. He's highly gifted and an expert in almost everything.
- Blackand Nerdy: Zigzagged. He's the nerdy person of color of the group. But his family is from Kandahar.
Elvis's other closest friend who shares a desk with him since first day of school. So she's maybe the person that best know him, apart from Boris and his parents. She's very patient with Elvis, even though he's been eating her pencils for years.
- The Smurfette Principle: Is the only girl in Elvis' main circle of friends.
Supporting Characters
Elvis' parents. Ireland iathe best (and only) postwoman in Icaria. While Leonidas is the best pastry cook in Icaria. They love their son, but they tend to suffer from all the trouble Elvis gets into.
The terrifying headmistress of Icaria's public school, who loves discipline and war. An expert in contact sports. It's rumoured she wears men's underwear.
- Cross-Dressing Voice: Voiced by a man. Resulting a deep gravely voice for her.
- Hippie Teacher: Temporarily was this when she got amnesia in "And Jennifer's Amnesia".
- Sadist Teacher: Always makes sure the school activities torments her students in any shape or form.
- Dub Name Change: Is named "Lagunilla" in the Spanish novels.
- Lonely Rich Kid: Is like this in a few instances, like in "And the Pinkerton School"
- Spoiled Brat: He's usually proud of that aspect of him.
- Token Rich Student: Comes from a wealthy family.
The richest man in Icaria. He pretends to be a patron and a bureaucrat, but he's a blackmailer, a tax evader, an extortionist, and a prevaricator. And Dumont's father, of course.
- Jerk with a Heart of Gold: When it comes to his son Dumont. When it comes to others, not so much.
- Jerk with a Heart of Jerk: Is a rich blackmailer, tax evader, extortionist, and prevaricator, and he knows it, because it takes one to know one.
- "Well Done, Son" Guy: Is proud of his Dumont, usually when he's a Spoiled Brat to others. Not so much when it's on himself.
