190 years ago, Inuyasha and Serenity were soul-bound sweethearts, but were forced apart. Serenity raised their son alone on the Moon until the kingdom fell when Lucas was four. Fully human in body but with a powerful demon soul, Lucas survived thanks to guardian Suhail (a shape-shifting black panther cub). He descended to Earth and trained relentlessly to become the ultimate martial artist — mastering ki, magic, and combat under legends like Goku, Naruto, and Goku across many verses.