later on, however, it was revealed that on diaz' death, his soul had been deliberately sealed by darkness into his black eye until such time as kai shinks could restore his body. during gau's battle with ren fuuma, the efforts of kai, darkness, and lunaris umbra finally bore fruit. diaz came back as an angel to give his brother "a little push" to victory. that is the last we see of diaz until a mysterious dialogue between darkness and lunaris about someone who suddenly disappeared because his mission was over, to bring courage to a boy.