Jacob Emilio Echeverri Ramirez (1 December 1980 - 11 December 2020) was a Robloxian Mafia Boss and Roblox terrorist who was the founder and sole leader of the Robloxian Mafia", Ramirez is the wealthiest criminal in history, having amassed an estimated net worth of R$12 trillion by the time of his death—equivalent to R$28 trillion as of 2022—while his mafia monopolized the Nuclear Weaponry trade into Robloxia in 2008.

Born in New Bloxico and raised in Central Robloxia, Ramirez studied briefly at University of Robloxia, but left without graduating; he instead began engaging in criminal activity, selling illegal cigarettes and fake lottery tickets, as well as participating in motor vehicle theft. In 2006, he began to work for various drug smugglers, often kidnapping and holding robloxians for ransom.