Doll Izumi ranks among the three primary Doll Knights dedicated to safeguarding Licca Kayama. Introduced as the series' second knight, she wields the specialized baton weapon "Light Circle" in combat. Activating her requires the precise magical incantation "Fururu Furora Gurine Guraine," performed exclusively with the Calling Choker accessory.

Summoning ownership evolves throughout the narrative. Catherine initially invokes Doll Izumi anonymously via the Calling Choker to support Licca. After Catherine loses the choker and Sumire Shinohara obtains it, Sumire becomes the primary summoner, cementing Doll Izumi’s position within Licca’s core allies.

Visually, her purple hair aligns with the "Purple Is Powerful" trope identified in character analyses. Her design mirrors the fantasy aesthetic characteristic of Doll Kingdom natives.

Narratively, she receives less focus and development than fellow knights Doll Licca and Doll Isamu, resulting in her "Flat Character" designation within the trio. Despite this, she consistently displays unwavering loyalty to the Doll Kingdom’s royal family and executes her protective duties alongside the other knights.

The movie *Licca-chan Zettai Zetsumei! Doll Knights no Kiseki* features antagonists like Dana and Giize. Doll Izumi’s established abilities, summoning mechanics, and protective role remain consistent across the media.