The violent young lady of the Boreas family, lords of the Fittoa Region. A red-haired beauty pursuing the path of the sword, she has a harsh personality. To defeat the Dragon God Orsted and protect Rudeus, she travels with her master Ghislaine to the Holy Land of Swords, the headquarters of the Sword God Style. She begins training under Gal, who took a liking to the look in her eyes, aiming to master the "Sword of Light." "Just swing your sword single-mindedly. When you're tired, sit and rest and think. When you're tired of thinking, stand up and swing your sword again." Following those words, she begins training alone, swinging her sword with total devotion. The central protagonist of the events at the Holy Land of Swords.

A master of the Sword God Style who previously earned the title of "Sword King" at the Holy Land of Swords. She brings Eris to the Holy Land to support her further training. Though a woman of few words, she has deep affection for her disciple and is a reliable master. To Eris, she is both a mentor in swordsmanship and a dependable guardian who overcomes harsh training alongside her. She watches over and supports Eris during her practice. A Beast-Race Sword King. She calls Gal "Master" but speaks to him casually.

The strongest swordsman at the peak of the Sword God Style, and one of the Seven Great Powers known as the "Sword God." As the head of the Sword God Style, he instructs many disciples and becomes the master who teaches swordsmanship to Eris upon her arrival. Possessing overwhelming skill, he is an idolized figure for those aiming for the heights of swordsmanship. A world-class swordsman and the peak mentor of his style. He is the one who forges Eris and allows her to grow significantly as a warrior. He was utterly defeated by the Dragon God Orsted and is a man he desperately wants to cut down. He is also Ghislaine's master.

The daughter of the Sword God Gal Farion and a Sword Saint training at the Holy Land of Swords. She is one of Gal's disciples. Gifted with natural talent, she possesses high-level swordsmanship inherited from her father. She is competitive and strong-willed, harboring a strong sense of rivalry toward the suddenly appearing Eris. While viewing Eris as a rival, they push each other to improve as swordsmen. A proud Sword Saint blessed with talent. A rival figure who burns with competitive spirit against Eris. She trains alongside Guest and Eris. However, she is somewhat distant from her father. During practice, she carries herself as a fellow disciple.

The disciple and granddaughter of the Water God Style master, "Water God" Reida Reia. One of the masters of the Water God Style, she becomes involved with Eris and the others at the Holy Land of Swords. Possessing high swordsmanship and the defensive/counter-attacking capabilities unique to the Water God Style, she becomes an important figure for Eris. A skilled swordsman inheriting the Water God Style. A person who boasts high technical proficiency under the teachings of her master, Reida. She trains with Guest and Eris. She becomes a rival to Eris and Nina.

Despite his eccentric appearance, he is a master of the North God Style and holds the title of "North Emperor." He appears at the Holy Land of Swords where Eris is training. He assists with Eris's practice. He provides support for the training.

A master of the Water God Style who holds the title of "Water God." She is Isolte's master and grandmother. She appears at the Holy Land of Swords with Isolte while Eris is training.

Dismissed by Gal as being "soft," he was defeated by Eris before even picking up his sword. He spends his days simply looking up at the backs of Eris and his crush, Nina, from a distance. He watches Guest from the shadows.