Guyferd borrows aspects from Kamen Rider, Bio Booster Armor Guyver and Fist of the North Star.
After the mysterious disappearance of his older brother Masato, Gou Kazama returned to Japan from his travels, determined to find him.
He soon discovered that Masato had been abducted by the Criminal Global Syndicate “Crown”, who had hopes to create the ‘ultimate fighter’, kidnapping the world’s strongest and most skilled martial artists to use in their inhuman experiments.
Being as powerful as Guyferd due to the bio-mechanism of the Guyborg body & Fallah's "empowering" ability, making the Metalferds superior to Mutians.
After the Daruga Tablet ended up in Crown's possession, some of the Metalferds are infused with its energies and evolve into more powerful beings known as Gaia Soldiers (ガイア・ソルジャー, Gaiasorujā).