Esteban Maroto

Twenty-fourth century Starfleet officer Esteban Maroto was the captain of the starship Istanbul and a Starfleet Academy classmate of Stephen April. Maroto played practical jokes on others, including April, a custom which reached fevered heights for the latter every April 1st on the Terran calendar, a day traditionally known in some levels of Earth culture as "April Fools Day". April's approbation at Maroto's antics earned him the nickname "Killer" (as in "April fools-killer"), by which Maroto called April in casual conversation ever since.

Maroto joined the Humanists sometime by 2380, when, along with Terran business leader Kwanzai Hiro, he tried to draw April to their cause.

Background
Maroto was named after Spanish comic-book artist Esteban Maroto.