Javi Garcia serves as the deeply passionate, resilient, and fiercely loyal Cosmic Fury Black Ranger. A gifted and expressive musician at heart, Javi's dedication to his team is tested in the ultimate capacity during the opening skirmishes of the cosmic conflict. When the team travels to the ancient planet Zordnia to unearth a countermeasure against Lord Zedd, they find themselves pinned down by massive corporate mining forces. Recognizing that the team needs immediate heavy transport support, Javi fearlessly steps forward to insert Master Red's ancient Staff directly into the structural altar to awaken the fleet. The resulting raw, unrefined energy feedback completely overwhelms his body, sacrificing his physical left arm to the grid in exchange for the successful awakening of the Cosmic Fury Zords.

The immediate aftermath of this trauma deeply affects Javi, threatening his confidence and his ability to interact with his beloved musical instruments. To help him heal and return to the front lines, legendary veteran Billy Cranston and the technician Solon combine their talents, constructing an advanced Cybernetic Prosthetic Arm using Rafkonian neural-interface parameters and Earth electronic components. Interfacing directly with his nervous system, this prosthesis integrates flawlessly into his armor design when morphed. Through the unwavering support of his sister Izzy and his teammates, Javi battles through his emotional doubts, adapting his musical phrasing and rhythm to his new physical reality and learning to play with newfound strength.

Stepping back onto the battlefield, Javi wields the heavy, broad-bladed Stego Spike Axe, using wide sweeping strikes to tear through divisions of Zentinels. He commands the high-velocity Cosmic Wolf Zord, guiding its tracking capabilities on the field and docking it as the permanent left leg matrix of the Cosmic Fury Megazord to provide essential balance during spinning combat maneuvers. Javi's musical spirit ultimately becomes a tactical asset when the Rangers orchestrate a brilliant, stadium-level musical distraction to disrupt Squid Ink Inc.'s excavation grids, allowing Zayto to unearth the hidden Dragon Zord. Standing victorious at the close of the war alongside his proud parents, Carlos and Rina, Javi proudly takes the stage at the global post-war victory concert, executing a flawless performance that marks the dawn of a peaceful new era for Earth.