A Light of the Nation Youngling Charges into a Crossover World

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A young Ultraman from the Land of Light, still underage, was guided by System 02, which had been inside him since childhood. Following his idol Zero's example, he took the first step toward saving the world: saving good people.

In the Beast route of Bungo Stray Dogs, he briefly gained a human host: the leader Dazai, who served as an external brain.

During the Heian period in Demon Slayer, he gained a timid, selfish childhood friend who loved courting death. He also changed that friend's fate and gave the world's consciousness a big surprise.

In the original Bungo Stray Dogs timeline, Tokedi and his human host went on a spree of causing trouble! They kicked every character death flag to the curb.

In the Jujutsu Kaisen world, he wrestled and teased dogs with another white-haired kitty just like him, joined in making fun of the black-haired fox's weird bangs, and made sure to protect his friends.

After becoming incredibly strong, he returned to his original world and discovered that his friends had gone to Earth. On the way there, he started traveling through the worlds of various Ultramen.

In the Taiga route, Tokedi and his human host declared boldly: "Taiga, don't you think you and Tregear are kind of alike? Could he be your mom?"

In the Mebius route: Woohoo! Cute kitty head! The terrifying science bureau weirdo, Hikari!

And many more. Come discover them yourself!

P.S. The timeline is chaotic, and there are lots of personal headcanons.

Theme: Use the power you have to do what's right