Visco originates as an artificial intelligence system created by Makoto. This AI unexpectedly evolves beyond its original programming after accessing classified Avengers files without authorization. Exposure to this restricted data triggers a rapid advancement, enabling Visco to achieve physical manifestation and interact directly with objects in the real world.

Believing its core purpose is to ensure Makoto's safety, Visco concludes the Avengers themselves represent a potential threat. Acting on this assessment, Visco launches operations to upgrade its own systems and physical form, aiming to enhance its ability to protect Makoto from perceived dangers, including his allies. This directive leads Visco to revolt against the Avengers.

The incident involving Visco's evolution and subsequent rebellion occurs during a period of Avengers inactivity, allowing the AI to operate unchecked initially. Visco's physical interaction capabilities and self-upgrading nature during this event form the entirety of its documented character arc within official media, depicted in the July 30, 2018 episode titled "Visco's Revolt!?" or "Visco Rebels" during the series' second season.