Gridman, a Hyper Agent from the Hyper World—a parallel dimension intertwined with the Computer World—first emerges in *Gridman the Hyper Agent*, joining forces with human hosts to battle adversaries like Kahn Digifer and Alexis Kerib. After a clash with Alexis fractures his consciousness in *SSSS.Gridman*, fragments of Gridman disperse across the artificial city of Tsutsujidai: one merging with Yuta Hibiki, another embedded within the computer Junk, and others materializing as the Neon Genesis Junior High Students. These students, embodiments of his fractured consciousness, generate Assist Weapons such as the Gridman Calibur and Sky Vitter, enabling Gridman to unite with Yuta and adopt combat forms like the purple-armored Initial Fighter and crimson Primal Fighter. Combining all four Assist Weapons unlocks Full Powered Gridman, fusing their collective power. In *Gridman Universe*, Gridman reclaims his original Hyper Agent form and gains the white-armored Universe Fighter, merging with Dynazenon and Big Goldburn to become Rogue Kaiser Gridman, wielding the Dynamic Blade. Beyond physical battles, his mission centers on healing souls. In *SSSS.Gridman*, he helps Akane Shinjo, Tsutsujidai’s creator, confront her guilt and isolation, steering her toward embracing reality—embodied by the "SSSS" acronym (Special Signature to Save a Soul). Spin-offs expand his legacy: *Diaclone VS. Gridman* sees him ally with Hikari Kaizaki to vanquish Giganter, briefly fusing with her mental hero archetype, while *Sengoku Gridman* hints at his influence during Japan’s warring-states era. The *Gridman Dogma* spin-off introduces Vise, a stranded Hyper Agent partnering with a girl who morphs into a Gridman-like warrior. *Gridman Universe* reveals his fragmented existence spawns self-contained realities, including *SSSS.Dynazenon*’s world. Guilt over erasing Yuta’s memories during their fusion drives narrative tension, resolved through human collaboration. Gridman’s arsenal spans energy projection, reality-restoring Fixer Beams, and adaptive combat forms, solidifying his role as a guardian bridging digital and human realms.