Fein (フェイン, Fein) and Sebé (清兵衛, Seibei) are another of the early teams. Little is known about them, but their elements are wind and speed and they are very sadistic. Fein is an arrogant mamodo that brags about himself becoming the next king, while Sebé believes that he can do whatever he wants when he uses Fein's powers. Having heard of Zatch's success, they go to Mochinoki to defeat him. They engage Zatch and Kiyo at a condemned building, and initially dominate them with Fein's super-speed abilities, thanks to his speed spell Yuruk and his whirlwind spell Wigar. Zatch defeats Fein when he uses his third spell Jikerdor for the first time, which magnetizes Fein to a nearby billboard (a water tower in the anime), holding him in place while Zatch burns his book.
In the end of the battle, Fein is seen in a picture with all the mamodo pictured by Zatch given to Kiyo.