Takeshi Yoroi is a 20-year-old former agent who transforms into the superhero Hurricane Polymar using a special polymer substance. This polymer grants him enhanced physical capabilities and shapeshifting powers. After his original world was destroyed by the antagonist Z, he became stranded in Shibuya, Tokyo. He spent one year living undercover there, working as a detective and establishing a connection to the city and its inhabitants before the main events.

During his time in Shibuya, Yoroi encounters the mysterious Damian Grey. Grey initially hires Yoroi's detective services to locate the powerful artifact known as the "Case," but later reveals himself as a dangerous monster pursuing the artifact for malicious purposes. Yoroi subsequently meets the dimension-traveling heroes Gatchaman, Tekkaman, and Casshan, alongside the central human character Emi Kaido. He joins their collective mission to protect Emi and recover the Case.

In the film *Infini-T Force the Movie: Farewell, Friend*, Yoroi operates as part of this hero team. The narrative follows the group tracking a singularity across dimensions, leading them to an alternate version of Ken Washio's world. There, they confront a corrupted Dr. Nambu who has weaponized the singularity as "Nexus," endangering reality. This world's sole surviving Science Ninja Team member, Joe the Condor, opposes Nambu. Yoroi participates in the ensuing battles against this threat alongside the team.

His character consistently utilizes investigative skills and combat proficiency derived from his background as both an agent and a detective. The polymer transformation remains his primary superhuman ability.