Yuuta Hibiki is the main protagonist of the anime series Gridman Universe, specifically in SSSS.Gridman. He is a high school student who wakes up with amnesia and discovers he can merge with Hyper Agent Gridman to fight against kaiju threatening his world. Throughout the series, Yuuta navigates the complexities of his lost memories while forming strong bonds with his friends, who assist him in his quest to protect the city. His character development is central to the unfolding narrative, emphasizing themes of identity and heroism.