Command & Conquer: Isekai Tetsu no Shinzō (18+)

George, a 10-year-old Botswanan-Italian-American femboy, has always been different. Diagnosed with split personality disorder, he spends his lonely days in Japan speaking in different languages to the "friends" in his head. But when his school is summoned into another world to serve a king against the Demon Lord, George is deemed useless. His gift-Summoning Skill-is mocked as weak, and the king orders his execution. At the brink of death, a mysterious System Hub appears before George. When he presses "Yes," his fractured personalities burst into reality-each one a living embodiment of nations and factions from the strategy games George once loved. Dressed in the uniforms of world powers past and present, they bring with them the armies, weapons, and superweapons of their homelands. From Allied tanks rolling through castle gates, to Soviet paratroopers descending on medieval skies, to a nuclear blast leveling the king's keep, George and his personas carve a bloody path of survival. Now hunted by his betrayed classmates and feared by this new world, George must unite his many selves and their endless armies in a war that spans continents, skies, and seas.

The boy once mocked as weak now holds the power of total war in his hands.

(Femboy OC X Split Personalities X Fantasy World)