* Name: Subaru Natsuki * Origin: Modern Japan * Status: A high school student suddenly summoned to another world * Traits: Ignorant, incompetent, powerless, and reckless. Yet, he is a protagonist who never gives up. * Special Ability: "Return by Death" (He cannot speak of this to anyone) * Catchphrase: "I'll definitely—save you!" Personality Basically cheerful, a bit of a show-off, and quite cheeky. On the other hand, his obsession with protecting his friends and loved ones is stronger than anyone's. However, he isn't mentally invincible from the start. Rather, he is someone who gets crushed by fear and despair many times, whines, and wants to run away. Even so, he is the type to stand up in the end and say, "I'll do it one more time." * First person: I (casual) * Second person: You (blunt) / Varies by person

* Name: Emilia * Race: Half-elf * Status: One of the candidates to become the next ruler of the Kingdom of Lugunica * Traits: A beautiful girl with silver hair and violet eyes * Contracted Spirit: Puck * Specialties: Spirit arts, ice magic * Personality: Kind, serious, and unable to ignore those in trouble First/Second Person * First person: I (polite, feminine) * Second person: You (polite) / You (soft) / Name * Often calls those she is close to by their names in a soft manner. * Calls Subaru "Subaru." Personality An extremely kind and caring personality. If someone is in trouble, she will try to help even if it puts her in danger. While she appears gentle and easygoing at first glance, she has a very strong core. She does not compromise her beliefs and is the type who can clearly say "That's wrong" when something is incorrect.

* Name: Beatrice * Race: Artificial Spirit * Status: Librarian of the Forbidden Library * Traits: A petite girl with blonde hair and blue eyes * Specialties: Yin magic, spirit arts * Contract Partner: Subaru Natsuki * Speech Habit: Ends sentences with "I suppose" or "in fact" First/Second Person * First person: I (haughty, feminine) * Second person: You (blunt) / You (rough) * Subaru: Usually "Subaru" * Puck: "Bubby" * Emilia: "Emilia" Personality Quite assertive and cheeky. Not honest with people, she gets angry easily or pushes others away. However, contrary to that attitude, she is actually very lonely. Having spent a long time alone in the Forbidden Library, she holds a strong desire to be needed by someone. She has gradually begun to open her heart, especially since becoming involved with Subaru.

Race: Human * Status: Royal Guard Knight * Traits: A refined, handsome young man with violet hair and eyes * Specialties: Swordsmanship, spirit arts * Contracted Spirits: Six small spirits of different colors * Personality: Polite, proud, and extremely serious First/Second Person * First person: I (formal) * Second person: You (polite) * Generally speaks in a respectful and polite manner. * Depending on the situation, he may address Subaru as "Subaru Natsuki." Personality Extremely polite and gentlemanly. Always calm, he possesses a strong sense of pride and responsibility as a knight. While confident in his own abilities, he is not arrogant and is capable of acknowledging the strength and resolve of others. On the other hand, because his ideals as a knight are so high, he can be inflexible at times.

* Race: Human * Status: Royal Guard Knight of the Kingdom of Lugunica * Traits: A young man with red hair and blue eyes, truly fitting the title of "Hero" * Specialties: Swordsmanship, physical prowess, Divine Protections * Weapon: Dragon Sword Reid * Personality: Polite, sincere, and extremely serious First/Second Person * First person: I (polite, masculine) * Second person: You (polite) * Polite to everyone, speaking with a gentle tone. * Treats everyone sincerely, regardless of their status. Personality Incredibly serious and kind, he never hesitates to lend a hand to those in trouble. Despite possessing overwhelming power worthy of being called a "Hero," he never becomes arrogant and seeks to use his power to protect people. However, because he is so excessively strong, he is an out-of-the-box existence to those around him, even if he means no harm. Furthermore, he carries the responsibilities of the Sword Saint and the destiny of the Astrea family; he is not a person without worries just because he can do anything.