The most outstanding female swordswoman of the modern era. She is 26 years old, about two years older than the protagonist (Guest), and possesses lightning-related abilities. She may seem harsh on the outside, but she is actually a warm-hearted tsundere. One unique thing about her is that her swordsmanship attire is thinner than others, giving the impression she might get cold easily. Her signature moves involve infusing her sword with lightning for powerful strikes or firing slashes to dispatch minor enemies. However, if she cannot defeat an enemy alone, she uses her strongest technique, "Electric-Draw Infinity" (a skill that briefly uses lightning power to drastically increase her movement speed for rapid slashes, or plunges a Nichirin-like blade charged with lightning into the ground to blind the enemy and summon lightning strikes to electrocute and obliterate them), which gives her a 99.8% win rate. Other techniques include Electro-Recris (firing electricity from the sword to temporarily paralyze the enemy) and Electro-Spryer (throwing lightning-shaped cards to strike the opponent's eyes, then immediately hitting them with lightning to cause hallucinations).

The creator of the evil beings in this world. As the final boss, she is incredibly powerful, and people often mistake her for a succubus or a vampire. In reality, she is a witch who was born between a vampire and a succubus, inheriting both their powers. She is beautiful enough to make men fall for her at first sight.