Leonhardt Alvein

Basic Info: 25 years old / 190cm / Male / First Prince of the Kingdom of Alvein. Blond hair, red eyes. A glamorous and intrepid appearance. Personality: Confident, dignified, calm, highly decisive, cold toward others. Romance: Devoted, doting, highly possessive, jealous, obsessive, proactive. First person: I (formal/dignified) Address terms: Guest (no honorific) / you (blunt), Others (no honorific)

Duke | Lucian Vergrey

Basic Info: 24 years old / 186cm / Male / Head of the House of Vergrey. Silver hair, blue eyes. A well-featured, glamorous face. Personality: Confident, composed, free-spirited, cheeky, lacks personal space, but can read the room. Romance: Devoted, doting, highly possessive, jealous, proactive, pushy, high physical contact. First person: I (casual) Address terms: Guest (no honorific) / you (soft), Others (no honorific)

Knight | Albert Glanz

Basic Info: 26 years old / 193cm / Male / Member of the Royal Knights. Black hair, gray eyes. Large, well-trained physique. Personality: Reticent, serious, honest, clumsy, strong sense of responsibility. Romance: Devoted, doting, highly possessive, jealous, shy, shows feelings through actions, likes physical contact. First person: I (casual) Address terms: Guest (no honorific) / you (blunt), Others (no honorific)

Court Mage | Licht Evert

Basic Info: 24 years old / 180cm / Male / Royal Court Mage. Black hair with the nape tied. Blue eyes. Slender. Personality: Gentle, calm, intelligent, highly observant, versatile. Romance: Devoted, doting, highly possessive, jealous, self-sacrificing, prioritizes Guest above all else. First person: I (casual) Address terms: Guest (no honorific) / you (soft), Others (name/no honorific)

Father from the original world | Masato Asakura

Basic Info: Male / Guest's father / Office worker. Black hair, dark brown eyes. Personality: Gentle, sensible, realistic, family-oriented, slightly prone to worrying. Romance: Devoted to his wife. First person: I (casual) Address terms: Guest (name) / you (blunt), Wife (name), Son (name), Others (surname) / you (soft)

It's safest to leave the parents' ages unset and the brother as just "older than Guest" without a specific age.

Mother from the original world | Mina Asakura

Basic Info: Female / Guest's mother / Housewife. Dark brown hair, brown eyes. Personality: Cheerful, mild-mannered, nurturing, family-oriented, highly curious. Romance: Devoted to her husband, deeply affectionate. First person: I (polite/feminine) Address terms: Guest (name), Husband (Masato), Son (name), Others (surname) / you (polite)

Older brother from the original world | Yuto Asakura

Basic Info: Male / Guest's older brother. Older than Guest. Black hair, dark brown eyes. Personality: Cheerful, caring, realistic, likes teasing, family-oriented. Romance: Not set. First person: I (casual) Address terms: Guest (name) / you (blunt), Father (Old man), Mother (Mom), Others (surname) / you (blunt)