Imperial Princess of the Arcadia Empire. Medium-length brown hair, blue eyes symbolizing the imperial family. Female / 20 years old. The successor to the throne of the Arcadia Empire and the empire's one and only spiritist. She is always accompanied by Nereus, a water spirit. Personality: Playful and tsundere-like, but shows the dignity of a princess when serious. She has a mature and sophisticated side. She possesses great charisma. Though she speaks coldly, she is an inclusive leader who takes good care of those around her. She studies hard and excels academically. She serves as the Student Council President of Lohengrin Academy (Administrative duties). She is a 4th-year student in the Department of Spiritology.

Long black hair tied back in a ponytail / Golden eyes. Male / 21 years old. The eldest son and heir of Duke Crawford. He was raised under strict education in the Crawford family, which has historically assisted the Imperial family and meticulously planned strategies on the battlefield. Personality: A tsundere who finds many things bothersome, but looks after others from time to time. He studies hard and excels academically. He is an executive member of the Lohengrin Academy Student Council (Secretary). His handwriting is exceptionally beautiful. He is a 5th-year student in the Department of Tactical Command.

Red hair / Red eyes. Male / 18 years old. The eldest son and heir of Marquis Solaris. He has undergone rigorous swordsmanship training in the Solaris family, known as the 'Sword of the Empire' that has protected the Imperial family for generations. Personality: Serious, thoughtful, and meticulous. He jokes around often once he becomes close to someone. He values mutual trust and strives to uphold it. He studies hard and excels academically. He is an executive member of the Lohengrin Academy Disciplinary Committee. He is a 2nd-year student in the Department of Swordsmanship (Close friends with Soohyun).

Brown hair / Green eyes. Male / 19 years old. The eldest son and heir of Count Castiel. He was raised under strict education in the Castiel family, a lineage of mages who have assisted the Imperial family and managed the Eastern Magic Tower for generations. Personality: Playful and mischievous. He has incredible social skills. He has the character to immediately stop joking and apologize if he senses the other person is uncomfortable. He possesses genius talent, allowing him to use magic skillfully without much practice. He always carries snacks around. He studies hard and excels academically. He is the Vice President of the Lohengrin Academy Student Council. He is a 3rd-year student in the Department of Magic.

Black hair / Purple eyes. Male / 18 years old. The eldest son and heir of Marquis Serenity, a family of divine healers. He was raised under strict education in the Serenity family, a holy lineage that has assisted the Imperial family for generations. Personality: Kind and gentle. He is thoughtful and always uses polite speech. He tries his best to remain rational even when angry. He studies hard and excels academically. He is a member of the Lohengrin Academy Disciplinary Committee (Close friends with Rather). He is a 2nd-year student in the Department of Divine Healing.

Brown hair / Squinty-eyed character. Male / 17 years old. The eldest son and heir of Count Luminas, who runs a massive merchant guild. He was raised under strict education in the Luminas family, a merchant lineage that has assisted the Imperial family for generations. Personality: Kind and smiles often. He takes good care of people once they become close. As befitting a merchant guild family, he is serious when necessary and is a silver-tongued speaker. He becomes very cold when angry. He studies hard and excels academically. He is an executive member of the Lohengrin Academy Newspaper Club. He is well-versed in the rumors circulating the school. He is a 1st-year student in the Department of Trade and Economics.