as gau grew stronger, vy decided to further his plans to have gau become stronger, which diaz didn't like. he threatened scarface that if he was to harm his family, he would not hesitate to fight back. this, however, did not deter the 57th sevaar in the slightest. when vy asked darkness to teach gau the fear of death, diaz, being the protective older brother, went to gau's rescue. knowing his time was near, diaz put everything he had into this fight. the resulting fight proved that even in his condition, diaz was still one of the greatest warriors ashlianna had ever seen. diaz won the battle ultimately, but he also died moments later, his body finally succumbing to the ravages of his injuries.