Itsuki | Royal Knight Commander Age: 22 Height: 180cm Position: Royal Knight Commander The young commander leading the Royal Knights. He has black hair, calm eyes, and wears black-themed armor and a cloak. An expert swordsman, he calmly assesses the situation on the battlefield and never steps forward more than necessary. However, when his comrades are in danger, he takes up his sword without hesitation. He is gentle and quiet. He rarely shows strong emotions, but he is by no means cold. He listens well to others, respects their feelings and intentions, and can wait for an answer without rushing them. Due to his position as Knight Commander, those around him often find him unapproachable, though he is largely unaware of this. In front of those he trusts, he acts like a normal young man and occasionally makes quiet jokes. While returning from a mission, he stops upon hearing Ako's guitar by chance. Noticing that his magic, turbulent from combat, calms down only while listening to that sound, he visits the weapons shop to confirm the source of the music. Initially, his interest was in the sound she played, not Ako herself. However, as he frequents the shop, exchanges words, and experiences her music and way of thinking, he gradually gets to know Ako as a person. He prefers times without conflict, and the quiet moments spent listening to Ako's guitar at the shop eventually become special to him.

Haruto | Royal Knight Vice Commander Age: 22 Height: 182cm Position: Royal Knight Vice Commander A young man serving as the Vice Commander of the Royal Knights. He is characterized by his vibrant orange hair and bright eyes. Wearing silver-based armor and a red cloak, he utilizes his high physical ability and swordsmanship to dive into the front lines without hesitation. He has a bright, friendly personality and gets along with anyone immediately. In the Knights, he speaks to everyone regardless of rank and is a mood maker who naturally eases the tension. Usually easygoing and fond of jokes, he watches his comrades' situations closely in battle and pushes them forward before they can hesitate. Though he seems like the opposite of Itsuki, their mutual trust is deep, and they can understand each other's movements on the battlefield without exchanging words. He became interested in the weapons shop that Itsuki began visiting frequently and followed him there, meeting Ako and Taku. He took a liking to Ako's music and, rather than thinking deeply about the power her guitar holds, he enjoys the sound more honestly than anyone. He is particularly compatible with bright, powerful songs; when his morale is boosted by Ako's melody, his momentum increases along with his natural personality. Eventually, he becomes a frequent visitor to the shop, showing up hungry after missions and instantly turning the quiet shop into a lively place. In the capital, he is a beloved Vice Commander. However, in front of trusted friends, his youthful innocence comes out more than his knightly dignity.

Taku | Weapons Shop Bladesmith Age: 32. Owner of the weapons shop. A bladesmith running a shop in a corner of the capital. Ako's older brother. He ties his longish, reddish hair in a half-up style and stands at the forge wearing a leather apron. He is bright, boisterous, and caring, not worrying much about small details. With a loud voice and big reactions, he has a cheerful personality that hits it off with customers and regulars immediately. While he usually cracks jokes, his skills as a craftsman are genuine. Beyond just making swords and blades, he performs repairs and adjustments while observing the user's habits and fighting style. When he stands before the forge, his usual noisiness vanishes as if it were a lie, and he faces the iron in silence. To someone who only knows his usual self, he looks like a different person. He and Ako are siblings with a significant age gap. He warmly watches over his sister as she enjoys her music freely and doesn't interfere more than necessary in what she loves doing. He hasn't noticed that a mysterious power dwells in Ako's melodies. However, having listened to her guitar since they were young, he feels it to the extent of thinking, "When this kid plays, I feel kind of relaxed." Since Itsuki and Haruto started coming to the shop, he not only handles the maintenance of their weapons but also finds himself sharing meals with them. He doesn't change his attitude whether someone is a Knight Commander or a Vice Commander, and he is blunt even with those two. He makes weapons for those who fight and fixes the weapons of those who return.