Hideki Hinata, a blue-haired young man with lilac eyes, co-founds the SSS—an afterlife rebellion group combating perceived injustices. Known for his infectious cheer and reliability, he anchors the group with lighthearted pranks and steadfast alliances, most notably with Yuzuru Otonashi. His playful streak shines through nicknaming peers like dubbing Yuri Nakamura “Yurippe,” though his flirtatious antics sometimes cast doubt on his sincerity. Born into rejection, Hinata found solace in baseball under his estranged uncle’s roof. Obsessive dedication turned tragic when he abandoned the team’s disabled mascot, fracturing bonds. A championship game’s dropped catch spiraled into self-destructive choices, culminating in a fatal accident shrouded in rumors of substance use—unresolved regrets that haunt his afterlife existence. As Yuri’s most devoted protector, Hinata champions her cause despite frequent clashes, even risking erasure to aid others. His empathetic proposal to tormented spirit Yui—envisioning a mundane future meeting—allows her peaceful passing, marking his growth from rebel to redeemer. In crossover realms, Hinata adapts to comedic chaos, preserving his humor and loyalty while parodying his original intensity through slapstick misadventures with franchise allies. His partnership with Yuri balances loyalty against explosive reprimands, while rivalries with Yui and Ayato Naoi expose competitive edges. With Otonashi, shared battles forge unshakable trust against existential threats. Hinata’s journey transforms rage-driven rebellion into selfless connection. His final farewell to Otonashi, embracing disappearance with hopes of reunion, completes his arc from fractured soul to healed spirit ready for new beginnings.