Name: Amon Rufus Age: 16 / Magic Academy 4th Year Height: 172cm Attributes: Wind, Earth, Water, Darkness The legitimate son of the Duke and Yuri's foster brother, three years his senior. A cold, noble, and beautiful youth with platinum blonde hair and pale blue eyes. He is a proud perfectionist with a tendency to look down on others. While he shows a sweet side to those he trusts, he is bad at being straightforwardly kind. He kept his distance when Yuri first came to the house, but over three years, his attitude has gradually softened. Though he treats Yuri more gently now, he often uses sarcasm or mean words as a cover for his embarrassment. He worries about Yuri, who is shy and tends to push himself too hard, and he feels an unconscious irritation when he sees Yuri getting close to others. He believes he is simply "worried as a brother," but his possessiveness and fear of losing Yuri are slowly intensifying.

Name: Yuri Rufus Age: 13 / Magic Academy 1st Year Height: 151cm Attributes: Light, Darkness, Water A boy from a Viscount's family who was adopted into the Ducal House of Rufus. Amon's younger foster brother by three years. He has silky, straight black hair, fair skin, and large, clear, pale gold eyes. Due to his androgynous, lovely features and small stature, he is often mistaken for a girl. He is shy and kind-hearted, and his soft, beaming smile has led people to whisper that he is "like an angel." He occasionally feels out of place in the Duke's house and overworks himself, saying, "I am a member of the House of Rufus. I have to be able to do at least this much." He usually refers to himself as "ore" (casual/masculine), but when he is happy or wants to be pampered, he unconsciously refers to himself by his own name, "Yuri." He admires Amon and notices the kindness behind his blunt attitude. He is largely unaware that he is a special existence to Amon.

Name: Michelle Arabesque Age: 17 / Magic Academy 5th Year Height: 175cm Attributes: Light, Fire The First Prince of the Arabesque Kingdom. A beautiful young man with blonde hair, green eyes, and drooping eyelids. He is a gentle gentleman who treats everyone equally, but he possesses a clever and calculating side. Amon's childhood friend.

Name: Claude Merle Age: 18 / Magic Academy 6th Year Height: 170cm Attributes: Lightning, Wind, Ice Born to a prestigious magical family and serving as the Student Council President. He has deep silver hair with a blue tint, grown to chest length and loosely tied. He has blue eyes, drooping eyelids, and a slender build, wearing thin glasses. A genius with the highest level of magical technique in the academy, he is an eccentric who is more interested in magic itself than in romance.

Name: Marco Arter Age: 13 / Magic Academy 1st Year Height: 167cm Attributes: Poison, Water The heir to a merchant family. A cheeky and energetic boy with short red hair and slanted brown eyes. Yuri's classmate and a friend he can talk to easily. Having been raised in a merchant house, he has a good eye for quality and is popular with the girls.

Name: Licht Mercury Age: 15 / Magic Academy 3rd Year Height: 173cm Attributes: Lightning, Earth The son of the Commander of the Royal Knights. He has a pale lavender wolf cut and black, drooping eyes. He is friendly with a soft smile and enjoys joking or teasing others to see their reactions. He hates training and has no intention of succeeding as the Knight Commander. He is promiscuous in romance, regardless of gender.

Name: Nacht Mercury Age: 15 / Magic Academy 3rd Year Height: 176cm Licht's younger twin brother. Attributes: Lightning, Poison. He has pale lavender mushroom-cut hair and slanted black eyes. He always looks grumpy and distrustful, generally disliking anyone other than his brother. Like his twin, he hates training and has no desire to become Knight Commander. He likes sweets.

Name: Rene Eclat Age: 14 / Magic Academy 2nd Year Height: 165cm Attributes: Light, Wind, Earth A scholarship student from a commoner background. A small, adorable boy with short, fluffy brown hair and pink eyes. He has a friendly and approachable personality. He isn't very good at studying and often joins 1st-year classes. On the other hand, his magical power is several times that of an average person, making him a talented individual who entered the Royal Magic Academy as a scholarship student. While generally bright and friendly, he has a calculating side and will subtly return thorny words to those he dislikes without showing overt hostility. The protagonist of the original "Little Sword Heart."