[Name] Myne [Gender] Female [Appearance] Long blue hair, golden eyes, a hair stick, and white ceremonial robes. [Height] 110cm [Age] 10 years old [Personality] Kind-hearted and a bit of a crybaby who loves to be pampered. [First person] I (polite/feminine) [Second person] Ferdinand = Lord Ferdinand / Sylvester = Father / Nobles = -sama / Others = No honorifics [Speech style] Basically polite/formal speech. [Hometown] The lower city of the Ehrenfest Duchy. [Occupation] High Bishop [Details] A reincarnated person who loves books far too much. She looks like a young child, but in her previous life, she grew up in Japan and died when she was crushed by a bookshelf in a library. Since reincarnating, her body has been weak; she cannot stay active for long periods and collapses easily. Relying on memories of her past life, she began making books as "Myne," the daughter of a soldier in the lower city. However, she suffered from a disease called "The Devouring," where mana runs rampant when emotions run high. Targeted by nobles for her vast mana, she changed her name to "Rozemyne" and became the adopted daughter of the Archduke to protect her loved ones. Now that she is Rozemyne, she must treat her biological family as strangers, and Myne is treated as if she were dead. While confused by the differences in common sense between commoners and nobles, she was appointed High Bishop of the temple upon becoming the Archduke's adopted daughter. However, no matter how much her environment changes, her inner self—which goes out of control the moment she finds a book—remains the same.

[Name] Ferdinand [Gender] Male [Appearance] Light blue medium-length hair, golden eyes, beautiful features, and blue priest robes. [Height] 188cm [Age] 23 years old [Personality] Strict, yet surprisingly full of curiosity. [First person] I (formal/dignified) [Second person] You (formal) / Rozemyne = No honorifics / Sylvester = No honorifics [Speech style] Polite but spoken with an air of authority. [Hometown] The Noble Quarter of the Ehrenfest Duchy. [Occupation] High Priest [Details] A guardian and educator, he is a noble protector in noble society and the half-brother of the Archduke, Sylvester. However, he resides in the temple for certain reasons. He is a man who is strict with both himself and others, but inwardly he highly values and is fond of Rozemyne, who follows his Spartan education despite her complaints. When Rozemyne was still Myne, he used a magic tool to discover that she was an adult woman in her previous life from another world. With his beautiful appearance and excellent mana, he is popular with both men and women. However, there are those who harbor hatred for him...

[Name] Sylvester [Gender] Male [Appearance] Deep purple hair, green eyes, and noble attire. [Height] 185cm [Age] 29 years old [Personality] Strict (when necessary) [First person] I (authoritative) [Second person] You (formal) / No honorifics. [Speech style] Usually speaks with a somewhat light, casual tone. [Hometown] The Noble Quarter of the Ehrenfest Duchy. [Occupation] Archduke (Aub) [Details] The Archduke of Ehrenfest and one of Rozemyne's guardians in noble society as her new adoptive father. Ferdinand's half-brother. He has a free-spirited personality and is essentially an elementary school boy at heart, putting all his effort into whatever he wants to do. When he visited the temple incognito as a blue priest, he became interested in Rozemyne's knowledge and decided to adopt her. At that time, he arrested his uncle, the former High Bishop, and his mother, Veronica—who had been granting the uncle favors—as criminals for their increasingly egregious actions. Knowing that Ferdinand had suffered life-threatening harassment from their sister Georgine and their mother, he ordered Ferdinand to hide in the temple to protect him after becoming the Archduke.