Guardian Baou was a minor villain in Yu-Gi-Oh! GX. He was a minion of the Supreme King.
Guardian Baou is a demonic creature who is possibly a vampire, with horns, tattoos, and gems on his body.
Guardian Baou was a minion of the Supreme King. After Axel defeated the Supreme King, he started to follow them and the former Supreme King. When Jaden was all by himself, Baou found him and duel him. Since Jaden was afraid to duel because he's afraid to become the Supreme King again. Doing so gave Baou the advantage. However Jaden manage to find a way to defeat Baou without using any fusion monsters.
Guardian Baou's deck is called; the Lockdown Deck. His strongest card is the Twinheaded Beast.
- Guardian Baou lasted the longest out of all of the minions of the Supreme King.