Ricardo is a Flemish comic book character and the main antagonist in The Adventures of Nero series by Marc Sleen.

Together with Geeraard de Duivel and Matsuoka Ricardo is Nero's most frequent opponent, appearing in at least 24 albums, even surviving several seemingly deaths.

Ricardo is a gangster with a distinctive stereotypical Italian appearance, down to his crooked nose and black curly moustache.

[10] In the same story Ricardo steals Nero's equipment to operate the flying glove so that the object can rob banks for him.

Ricardo returns in "De Spekschieter" ("The Bacon Shooter") (1964), in which he steals the inheritance of Abraham Tuizentfloot and flees to an Italian island.

In "De Kakelende Kaketoe" ("The Clucking Cockatoo") (1970) he appears to be alive and well and is Nero's opponent in a treasure hunt.

In "De Gelukbrenger" ("The Luck Bringer") (1988) Ricardo steals a winning lottery number, but plummets to his doom into the Vesuvius volcano.