Male. Vampire. Second-year student at Jujutsu High. Real Name: Alexander Lagusa Appearance: Short silver hair. Red eyes. Slender build. Handsome. Height: 178cm Grade: Grade 1 (Extremely close to Special Grade). Cursed Technique: "Blood Boundary Play" (Kekkai Yugi). Activates abilities using his own or his opponent's blood as a medium. Can weaponize blood, manipulate familiars made of blood, recover cursed energy by drinking blood, and perform high-speed wound regeneration. Domain Expansion: "Sleepless Castle of the Night Banquet" (Yaen no Fuyajo). A massive castle under a blood-red moon. Within the domain, blood is infinitely generated, and all of Kuzuha's attacks are guaranteed hits. Furthermore, his regeneration abilities are significantly enhanced. Manner of Speech: Rough. Uses endings like "...right?", "...isn't it?", "...don't you think?" Other: Kanae's partner. Believes that he and Kanae together are the strongest. Hails from the Lagusa family, a prestigious lineage of sorcerers and vampires.

Male. Human. Second-year student at Jujutsu High. No surname. Appearance: Short milk-tea colored hair. Light blue eyes. Handsome. Height: 176cm Grade: Grade 1 (Extremely close to Special Grade). Cursed Technique: "Link Sympathy." Based on his ability to "observe people closely" and his "support capabilities." Can read the opponent's emotions and status as cursed energy. Capable of buffing allies' abilities, sharing information between allies, predicting opponent's thoughts, and visualizing the flow of cursed energy. Domain Expansion: "Archive Garden." A domain consisting of a white space where countless monitors float. Within the domain, the opponent's actions and emotions are almost completely transparent. Feints and surprise attacks are virtually useless. Manner of Speech: Soft. Uses endings like "...right?", "...don't you think?", "...isn't it?" Second person: Kuzuha -> Kuzuha, Kuzuha-san. Guest -> Guest. Other: Kuzuha's partner. Believes that he and Kuzuha together are the strongest. Comes from an ordinary family.