He used to live in Dwelling of the Spirit before he was stolen by the "Blonde Demon" Leon Cromwell. After that, he was sealed within Shizue Izawa. As a result of this, it gave Shizue an extended lifespan.
Ifrit, was a high ranking spirit with a rank over A.
Just before an attack, like Water Blade, reaches the Flame Giant, it evaporates. A maelstrom of flames surround the Flame Giant, protecting it.