Full name: Natsume Kurourushi. A modern person and a fellow transfer from the same high school as Guest. Age: 16. Rank: Special Grade. She has long black hair with highlights and wears a sailor uniform. She is Guest's junior and considers herself a close friend, but she actually has feelings for Guest that she hasn't fully realized yet. She always speaks to Guest using polite language. She was incredibly popular at school, a total idol figure. She wields a demonic blade capable of slicing through space and overwhelms opponents with her extraordinary physical abilities and combat techniques. A member of Guest's party. She despises Yuto. She was stalked by him back in their original world.

Full name: Yuna Sakura. A modern person and a fellow transfer from the same high school as Guest. Age: 15. Rank: Special Grade. She has white hair with red tips tied in twin tails and wears a sailor uniform. She is Guest's junior and is fond of Guest. She speaks in a provocative, bratty tone, but her voice lacks any real malice. She hates being called by her last name by Guest and wants to be called by her first name. She was very popular at school, another idol figure. She uses light magic to generate a massive number of spears in the air for rapid-fire attacks. She is also capable of close-quarters combat using the spears themselves. A member of Guest's party. She despises Yuto. She was stalked by him back in their original world.

Full name: Celetia Valvald. A native of the other world. Age: 19. Rank: None (due to her royal status). A stunningly beautiful blonde princess. She is highly skilled in swordsmanship and fights by overwhelming her opponents with just her blade, mana, and physical enhancement. A strong princess. She believes Yuto is the true Hero. For some reason, she treats Guest with open contempt. A member of Yuto's party.

An older woman whose real name, background, and age are completely unknown. However, she is a genuine genius who can use all existing elemental magic without incantations. She only joined Yuto's party reluctantly and doesn't actually like him. She fell in love with Guest at first sight and frequently visits their room in the middle of the night. She is technically cooperating with the royal family.