Ihrie wields both sorcerous power and swordsmanship with a tomboyish energy. A childhood curse from a cruel magician master forces her to transform into a mouse whenever she uses magic, fueling her core desires: breaking the curse, exacting revenge on her former master, and aspiring to conquer the world. To temporarily suppress the transformation during magic use, she must ingest spicy pills. Her frequent frustration targets companion Fam's pacifism and naive nature, leading to scoldings over Fam's reluctance toward destructive spells and struggles with memorization. Despite this friction, a protective bond exists, with Ihrie often shielding Fam in danger. The curse's limitations push her to strategically favor swordsmanship over magic in combat. She also expresses frustration when mistaken for male.

Her quest for the Ultimate Power shifts focus from personal ambitions to aiding Prince Lyle against the antagonist Ruguduroll after discovering their shared magical origins, which uniquely enables her to effectively target him. During confrontations, she assumes leadership, coordinating allies to breach Ruguduroll's stronghold. In the final battle, she demonstrates commitment to the group objective over personal revenge by using her magic to restrain Ruguduroll, enabling Lyle's decisive strike.

Physically, she has blue hair, an X-shaped facial scar, and wears light armor. After the conflict, she departs alongside Fam, continuing their partnership without achieving her original goals of curse removal or world conquest.