Luca, a cybernetically enhanced calico cat, serves as co-pilot and tactical partner to Amy Stapleton, Team Satomi's midfielder. Initially restricted to telepathic communication with Amy during races, their bond forms a composite personality vital for coordinating team strategies and mech operations. This link enables Luca to seize control of Amy's mech when required, deploying advanced combat skills in high-speed races. Cybernetic upgrades allow communication with other animals like Team Edgeraid's Sola, though early interactions remain exclusive to Amy.

As secondary tactician, Luca shares analytical duties with Amy, leveraging computer expertise to thwart cyber threats. This proves pivotal during Team Satomi's final race against Team White Snow, where Luca devises a backup plan to counter Max's hacking attempt and preserve operational integrity. The cat displays a deadpan, occasionally snarky demeanor, especially when observing conflicts between teammates Takeshi and Liz. Luca prefers female companionship and avoids physical contact with males.

Luca's role expands beyond tactical support over time. By Team Satomi's first race of the 2051 season, concluding the second season, the entire team gains the ability to hear and understand Luca's communications, deepening integration. Outside racing, Luca attains celebrity status in the IGPX universe, endorsing branded cat food and achieving recognition beyond the team. No origins or pre-team history are detailed, with focus remaining on functional contributions during depicted events.