Grudiev (Gurdijeff) is the Earth Guardian. He takes on the form of a large bluish-green, Space Godzilla-inspired dinosaur with long crystal spikes sticking out of his back. Most of his summon attacks involve him bursting from the ground. In Wild Arms 4 he is a known as Code G and can be summoned from a HEX with the Earth leypoint in it. In Wild Arms 5, he has an earth-elemental TF System tower named after himself, known as "Tower G".
The four main guardians, Fengalon, Grudiev, Schturdark, and Moor Gault, are all based off the Four Symbols in Chinese mythology. Grudiev is based off of Meng Zhang, the Azure Dragon.