The Supreme King reveals himself as Jaden. However, he doesn't actively hunt for opponents this was shown when he let Axel leave his castle without giving chase after defeating Jim Crocodile Cook, and he only Dueled Jim because it was the latter that challenged him. As the Supreme King, his cruelty has no bounds as he is willing to sacrifice as many people as he has to in order to accomplish his goals, and he also has a lack of remorse after defeating someone himself.

The Supreme King is also quite condescending, often mocking his opponent as he sees their efforts as futile because they are weak in his eyes, although he doesn't deviate from his reserved attitude while doing so. Unlike Jaden, The Supreme King is cold, collected, arrogant, ruthless, and merciless, but always carries an air of intimidation as noted by Axel Brodie. Jaden's face also elicits anger and hatred through a constant scowl, and he speaks in a bland monotone (in the dub, his voice is coarser than usual). When he possesses Jaden, he dons his aforementioned outfit and Jaden's eyes become golden, giving him a somewhat demonic look.

To signify his position as the Supreme King, he also wears a black helmet that functions as a crown. The Supreme King is a shadowed figure dressed in black and gold medieval knight-esque armor with six tendril-like spikes, two jutting out of the armor's back and four jutting out of the shoulders, a headdress with a tall collar and a floor-length red cape.

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