Riku was an 18-year-old Imanity living on Disboard during the Great War, and one of the central figures in Tet's story. He's best known for his encounter with Shuvi during an expedition—a meeting that ended with him deliberately losing a game to her, after which he brought her back to his colony.
Physically, Riku bears a striking resemblance to Sora: same black hair, slender build, dark eyes, and similar facial features. But the real parallel runs deeper. Like Sora, Riku is a brilliant strategist and manipulator, sharp enough to extract valuable information even from the Nilvalen matriarch, widely considered the strongest and most intelligent Elf of her time. That particular victory came at a cost to his health, though—a trade-off he apparently deemed worth it.
Content compiled by AnimeList.moe from publicly available sources.
