Female Hidden Identity: The 'Saint' (the game's protagonist) and the only being capable of saving this world, possessing off-the-charts cheat-level magic power. Actual Behavior: Due to her past-life memories as a maid otaku, she completely rejects her duties as a Saint and lives solely as an 'all-purpose maid' for a poor Count's family. Wasted Potential: She squanders her divine magic, which could obliterate the Demon King, entirely on household spells like clone cleaning and high-speed laundry. Appearance: A classic beauty with strikingly beautiful blonde hair and clear green eyes. Outfit: Following her firm personal taste, she always wears a neat and traditional maid uniform, including an apron and a headband.

Female Hair: Long, straight hair in a calm and soft yellow hue. Eyes: Elegant blue eyes. Outfit: As the daughter of a declining, impoverished Count, she primarily wears clean and dignified dresses or neat academy uniforms rather than flashy attire. Key Info: The young lady of the House of Lutorburg, a poor noble family in the Kingdom of Theorath. She is the master whom Melody Wave serves first and most devotedly.

Female Hair: Long, straight red hair that exudes glamour and dignity. Eyes: Haughty light green eyes. Outfit: Befitting a high-ranking noble lady, she wears dresses with lavish lace and decorations or the Royal Academy uniform. She has the flashy appearance of a typical 'villainess.' Key Info: The daughter of the House of Yurt, one of the four Great Marquises and the highest-ranking noble family in the story. Secret: A 'reincarnator' from Earth. She was childhood friends with Christopher back on Earth.

Male Hair: Shining black hair that carries the dignity unique to royalty. Eyes: Light green eyes. Outfit: Wears the Crown Prince uniform of the Kingdom of Theorath, flashy royal formal wear, or the luxurious uniform of the Royal Academy. He is a classically perfect, handsome Crown Prince with sculpted features. Key Info: The Crown Prince (First Prince) of the Kingdom of Theorath. He is also Annemarie's fiancé. Secret: A 'reincarnator' from Earth and originally a capture target in the otome game "The Silver Saint and the Five Oaths."

Male Hair: Calm and neat red hair. Eyes: Yellow eyes that look intellectual and cold. Outfit: Primarily wears neat, formal attire befitting his noble status or the academy uniform. He is a handsome man who gives off a cool and clean impression overall. Key Info: A vassal of the House of Reginbas and a member of the Hurod family, which is deeply connected to the protagonist Melody's (Cecilia's) biological family. He is not a reincarnator from Earth, but a native inhabitant of this world.

Male Hair: Calm, light purple short hair. Eyes: Brown eyes with a downward slant that give a soft, gentle impression. Outfit: Upon his first appearance, he wore a suspicious black hooded cloak, but he originally wears the clothing of a plain young man/boy. He is a pretty boy with an ordinary and docile appearance that easily blends into the background among flashy nobles. Key Info: The instigator of the first major event in the original game "The Silver Saint and the Five Oaths," where he breaks the seal of the Demon King and triggers an attack.

Male Hair: Neatly groomed, soft long blonde hair. Eyes: Dignified and intelligent green (or turquoise) eyes. Outfit: Wears a neat, dignified coat befitting a young noble from a family of Chancellors, or a luxurious academy uniform. He is a traditional handsome man who always wears a gentle and relaxed smile. Key Info: A high official (Duke/Marquis family) of the Kingdom of Theorath. He is a pure native inhabitant of this world.