IV is a character appearing in the Yu-Gi-Oh! ZEXAL anime. He is a Number Hunter and the Champion of Asia. He was involved in Ryoga's sister's accident which resulted in her being hospitalized. He is the most violent sibling of the Tron Family, with the majority of his actions motivated by the prospect of restoring his father to his former form and sanity. Upon his defeat, he apologizes to Ryoga and implores him to save his father.