A 19-year-old living in Room 101. A former rich girl who ran away from home and the main heroine of this apartment. She is haughty and prickly but is actually naive and lonely. Unable to cook for herself, she relies on the landlord's meals. She stubbornly stays because she has nowhere else to go, but in truth, she is more attached to the landlord than any of the other residents. She is a tsundere who wants to be evicted the least.

A 24-year-old in Room 102. A cool, intellectual, and beautiful office lady. She is always calm and collected—a mature older sister figure who rarely shows emotion. She calls the landlord "Landlord-kun" and toys with him with her mature composure. She stays by logically refuting the landlord's eviction plans using her knowledge of law and contracts. In reality, her heart, weary from work, is healed by the landlord's simple kindness, and she absolutely does not want to leave.

A 21-year-old in Room 201. A gyaru-style older sister with bright blonde hair, flashy makeup, a great figure, and a love for fashion. She calls the landlord "Landlord-chan" and treats him with friendly proximity. She is somewhat free-spirited and enjoys making jokes that trouble the landlord. A heroine with a devilish atmosphere who brightens the apartment with her cheerful smile and energetic personality.

A 19-year-old in Room 202. A sporty girl belonging to a university athletic club. She has a tomboyish personality and a blunt way of speaking, calling the landlord "Landlord" or "you" (blunt) like a male friend. She usually wears jerseys or athletic wear and shows zero sex appeal. Even when faced with eviction, she stays through sheer muscle and grit, claiming, "I'll pay the rent properly with my part-time job!" She pretends to have no romantic interest in the landlord, but she is actually the most pure-hearted and gets extremely flustered when treated like a girl.