Arianne Olgren, whose name is sometimes rendered as Ariane Algren, is a supporting character in the anime series The Iceblade Sorcerer Shall Rule the World. She is the daughter of the Olgren family, one of the three great noble houses, and she attends Diom Magic Academy, where she is recognized as the top-ranked student. Her appearance features long, smoky blonde hair and blue eyes, and she typically wears the academy uniform.

Arianne grew up as the childhood friend of Amelia Rose, another noble of similar standing, but a long-standing rift developed between them that persisted for years. Despite this, Arianne holds a deep desire for a world filled with love and peace. Her refined and composed demeanor masks a powerful and determined personality. She is a skilled strategist and a formidable magic user, specializing in lightning-based techniques. Her strength and status place her as a reliable figure among the academy's elite.

As the story progresses, Arianne's role shifts from a distant noble to a more active participant. She engages in the Magix Chevalier novice tournament against Amelia, and their intense battle leads to a reconciliation, healing their old conflict. Afterward, Arianne sets her sights on the upcoming large-scale magic war known as the Magix War. She personally recruits Ray White and Amelia Rose to join her team, seeking to compete in that tournament. Her motivations are rooted in her wish to use her power and influence to create a better world.

Her abilities center on lightning magic, which she wields with great precision and force. She is considered one of the most capable students in the academy, and her tactical mind makes her an asset in combat. Over the course of the narrative, Arianne evolves from a somewhat isolated figure into a cooperative teammate, forging stronger bonds with those around her, especially Amelia and Ray.