supreme king (yu-gi-oh! gx)

The wielder of "The Gentle Darkness" and the alternate, darker personality of Yuki Judai that possessed him until he was defeated, serving as the final antagonist of the third season in the Yu-Gi-Oh! GX anime.
The Supreme King plays an Evil Hero deck, which are vile incarnations of Juudai's Elemental Heroes.

Not to be confused with Supreme King Z-ARC from Yu-Gi-Oh! ARC-V.