Borr operates as one of the four Neon Genesis Junior High Students, a covert team of Hyper Agents supporting Gridman. He transforms into the twin-drill tank Assist Weapon Buster Borr. In human form, Borr presents an androgynous appearance with orange hair styled in two medium-low ponytails, blue eyes, and a slender frame standing 133 cm tall and weighing 32 kg. His attire includes a gray shirt, black tie, black button vest, black jacket adorned with a gold Scorn-inspired brooch, black pants, and shoes. Despite his youthful look, he is male. Borr exhibits a sassy, outspoken, and snarky personality. As the group’s youngest member, he displays confidence in his skills and a penchant for showmanship. Easily irritated—particularly by Sho Utsumi—he retaliates with signature shin-kicks. He remains observant, quick to detect anomalies like Akane Shinjo’s suspicious behavior, and wields a Scrap Maker Dagger in human-form combat. His primary ability activates by shouting "Buster Borr!", morphing into a futuristic yellow-and-white drill tank. This form deploys standard missiles, Forest Extinguisher Missiles (water-based fire suppressants), and Sydney Super Adhesive Missiles (pink immobilizing adhesive). Twin Drills enable subterranean movement and reveal plasma cannons in Buster Mode. Borr combines with Gridman to create Buster Gridman, enhancing durability, firepower, and unleashing the Twin Buster Grid Beam. He also contributes to Full Powered Gridman by merging with all Assist Weapons at reduced size. Originating as a fragment of Gridman’s consciousness from the Hyper World, Borr manifested in Tsutsujidai after Gridman’s defeat by Alexis Kerib. During the final clash against Alexis, he and his teammates reintegrated into Gridman via Acceptors, restoring Gridman’s true form before returning to the Hyper World. In *Gridman Universe*, Borr rejoins the team to battle kaiju, participating in new fusions like Powered Knight Zenon and confronting the entity Mad Origin. Spin-off media features Borr in *SSSS.Gridman ANOTHER LOAD*, where he and Vit traverse alternate dimensions—including one where he rules as a demon king in a fantasy realm. *Neon Genesis Junior High Student Diary* chronicles his daily life during the series, while *Neon Genesis Junior High Student Butler Cafe* depicts him working in a café under temporary reality alterations. Trivia notes: His name derives from the Swedish word "borr" (drill), honoring the Twin Driller from *Gridman the Hyper Agent*. The Sydney Super Adhesive Missiles reference Sydney Forrester from *Superhuman Samurai Syber-Squad*. His decorative drills resemble those of the kaiju Heisei Moguera from the *Godzilla* series.