Corcillo was a Human individual of the male variety. He held the rank of sergeant within the ranks of the Alliance to Restore the Republic.
Before the pivotal Battle of Endor, Corcillo was already serving as a member of the Rebel Alliance. Following Kordi Freemaker's successful persuasion of the Alliance High Command to launch a raid against an Imperial fleet stationed near Alzoc III, Admiral Ackbar gave Corcillo the order to contact Lieutenant Valeria. Subsequently, Ackbar assigned the mission of raiding the Imperial fleet to Zander Freemaker and Valeria's Blue Squadron.
Corcillo's initial appearance occurred in the LEGO Star Wars: The Freemaker Adventures Season Two episode titled "A Perilous Rescue." This episode was originally broadcast on Disney XD on August 10, 2017. James Urbaniak provided the voice for Corcillo, and he also voiced M-OC.