Gaia Knight, known as "Knight Gaia" (
This series consists of Extra Deck monsters - almost all of them were released in the early stages of a new era to promote a new type of Summoning mechanic, beginning with "Gaia the Dragon Champion" (one of the first Fusion Monsters to be released) in Legend of Blue Eyes White Dragon.
Although this series is not a part of the "Gaia The Fierce Knight" archetype, it is thematically related to it.
"Gaia Drake, the Universal Force" appears as a character in Yu-Gi-Oh! 5D's World Championship 2011: Over the Nexus.