Haberu Kikuchi is a key member of Otaki Factory, a local engineering workshop, where he collaborates with Yun Arikawa and their supervisor Goro Otaki. Specializing in physical labor and technical operations, his efforts are vital to the factory’s daily functions. His muscular physique, stemming from a longstanding commitment to weightlifting, earned him the high school moniker “Barbell”—a title that persists due to his ongoing dedication to the hobby.

Haberu shares a close bond with Yun, partnering in paranormal investigations and confronting kaiju threats. Despite his imposing strongman appearance, he exhibits a keen ability to dissect complex technical data, translating scientific terminology into accessible insights during high-stakes scenarios. He attended high school with Mei Kamino, their paths diverging until global crises reunite them in shared battles.

Throughout their struggles, Haberu engages in clashes against supernatural entities, aiding Otaki and Yun in deploying defenses such as the mechanized Jet Jaguar. His contributions blend physical prowess with practical problem-solving, bridging the gap between theoretical strategies and their real-world implementation.