F Dynasty (or F-sangre, in the Japanese version) is a group of fictional characters from the popular Beyblade anime and manga series. Raul and Julia Fernandez are the twin Beybladers representing Spain. They were born and raised into a circus,and specialise in tag team Beyblade matches. Their coach is Romero.

Although they prefer to Beyblade in tag team matches, they are both powerful Beybladers on their own. When Beyblading together, their can combine their attacks to Gemini Grash and Gemini Attack.

F Dynasty only appears during season three of Beyblade, Beyblade G-Revolution

Source: Wikipedia