El Hazard and it's characters are owned by AIC and Pioneer LDC.  The author owns only 
the writing.

Summary of prequel, Rock and Redemption 
Rock and Redemption started three months after the end of the first OVA. Hiashi, fleeing 
his violent father, escaped into El-Hazard when Makoto rescued Ifurita. He gained the 
ability to use any Elemental Lamp within a hundred feet and to use Elemental power as 
healing. Soon after arriving Kazusa, the ghost of the last Priest of Rock, tried to kill him 
because he was a threat to his plans. Kazusa wanted to use his lost Lamp of Rock to 
create a stone replica of his body and infuse it with the Lamp and his soul. 
But it was the Lamp who found Hiashi. Using the Lamp and his power, Hiashi defeated 
Kazusa. His victory made him the first man to become a Priest in the Elemental Church 
in centuries and opened the door for men to the Church as a whole. Also during his brief 
residence in El-Hazard, he won the heart of Shayla-Shayla. Thanks to some rediscovered 
laws, the two were allowed to marry while retaining their positions within the Church.