Izumi acts as both priest and sworn protector to a princess, blending paternal guardianship with tactical expertise in her retinue. Proficient in restorative and barrier magic, he commands the Ryu Priest Baurus—a support-focused mechanoid deploying force fields, immobilization fields, and wind manipulation. His combat versatility merges arcane arts with searing close-range body strikes, channeling physical prowess alongside mystical disciplines.

His history centers on surviving sacred trials at an isolated temple with the princess and a knight, securing a mace-shaped Spirit Stone that triggered his mechanoid’s evolution into Ryu High Priest Baurus. This ascended form grants aerial mobility, a staff armament, and storm-conjuring abilities, unveiled during a pivotal clash in the narrative’s climax.

Alternate timelines in expanded stories position him as the princess’s guardian during her infancy after her realm’s collapse, operating outside main continuity. A self-contained story arc hints at unresolved tensions with a past mentor, though their conflict’s particulars remain undefined.

One storyline temporarily subjects him to demonic influence, requiring allies’ aid for purification. His summoning rituals differ between continuities: Mist Tarot cards anchor his primary appearances, while alternate media employs consecrated weapon fragments for mechanoid deployment.

The Ryu Priest Baurus mechanoid operates at 442 units tall, 2490 units heavy, with 138000-unit output, wielding telekinetic drumstick projectiles and repair-focused healing systems. Its evolved Ryu High Priest configuration amplifies these parameters to 7503 magical output and 6350 defensive ratings, integrating stormcaller staff armaments and enhanced flight dynamics.