Hearts and his twin brother, Phi were born into royalty and raised together in Dread Tower. Being the younger sibling, Hearts always felt inferior to his brother and believed he could never catch up to him. One day, the twins' butler presented them with a gift from their father: a pair of Beyblades called Dead Hades and Revive Phoenix. Hearts immediately chose Hades, much to the ire of Phi who believed that as the older sibling, that he should have first pick. When Hearts refused to give Hades up, an argument broke out between the twins, which in turn severely strained their relationship. Hearts stayed at Dread Tower, while Phi left for what would later become his quest for destroying people's Beys.

(Source: Beyblade Wiki)