Ihrie is a sorceress and swordfighter with tomboyish traits. A childhood curse inflicted during her apprenticeship under a cruel magician transforms her into a mouse whenever she uses magic. This curse drives her primary goals: acquiring the "Ultimate Power" to remove the affliction, gaining vengeance on her former master, and pursuing world conquest.

Her physical appearance features practical armor, a headband, and a scar, reflecting her combat focus. In one notable fight, her armor split, accidentally revealing her gender to an opponent who had mistaken her for male.

Known as a "Ruin Explorer," Ihrie specializes in finding magical relics within ancient ruins. Her potent magical abilities are severely limited by her curse, forcing her to rely strategically on her sword skills to avoid transformation. She trains with fellow swordsman Miguel to hone these combat capabilities. Her partnership with fellow explorer Fam involves frequent friction, primarily due to Fam's careless magic use and poor spell memorization. Despite conflicts—including Fam once absconding with their shared equipment—Ihrie typically reconciles without holding lasting resentment.

Ihrie exploits her cursed mouse form during interactions with rival sorceress Rasha, who suffers from severe musophobia, provoking debilitating fear. While seeking the Ultimate Power, Ihrie discovers her magical affinity matches antagonist Ruguduroll's, allowing her spells to bypass his defenses and harm him directly.

The finale reveals Ruguduroll's corruption originated from despair over societal injustices. Ihrie participates in the assault on his stronghold, combining her magic with Fam's to counter his powers while prince Lyle strikes the decisive blow. Following Ruguduroll's defeat, she departs alongside Fam to continue their explorations.