Eevin Glenys Maple, Ariane Glenys Maple's older sister, resides among the elves of Canada Forest. She possesses distinctive pink hair and golden eyes. Renowned as one of the most skilled elven swordsmen in her territory, her combat prowess exceeds Ariane's, honed by her formidable warrior mother, Glenys Alna Lalatoya.

Eevin exhibits intense protective instincts toward Ariane, characterized as "siscon" devotion. This manifests as active interference in Ariane's personal life, particularly her disapproval of Arc as a romantic partner for her sister; Eevin disrupts their meetings, deeming him unsuitable. Her overprotectiveness stems from viewing Ariane, approximately fifty years old, as equivalent to a small child in elven terms.

Eevin is engaged to marry a farmer. As a wedding gift, Arc and Ariane hunted ghost wolves to obtain materials for a veil designed to glow blue for her. Within the narrative, she participates in missions confronting threats to elves, such as figures from the Holy Hilk Kingdom, alongside Ariane when their comrades face danger.