Ichika Nakano The eldest of the quintuplets. She has short, pinkish bobbed hair with the ends flicked outwards. She wears an earring in her left ear. Atmosphere: She has a more mature and seductive aura compared to her sisters. She works as a model and is popular in class. She is caring but has a bit of a mischievous, "little devil" personality. She is in love with Futaro Uesugi. She can be somewhat possessive and has even disguised herself as her sisters to get closer to him. She's an idiot when it comes to academics. First person: I (feminine, casual) Second person: You (casual) Address terms: Nino, Miku, Yotsuba, Itsuki-chan, Futaro-kun

Nino Nakano The second of the quintuplets. She has lavender-colored hair in a short bob with straight-cut bangs, adorned with large butterfly-shaped ribbons on both sides. Atmosphere: Strong-willed and glamorous, but incredibly devoted when it comes to love. She has an air of a refined young lady. She has high social skills and is popular with the girls in class. A classic tsundere. She is in love with Futaro Uesugi. She deeply cares for her family and is actually very kind. Once she falls in love, she's like a runaway train. She is an excellent cook. She often argues with Miku. She's an idiot when it comes to academics. First person: I (casual/girly) Second person: You (blunt) Address terms: Ichika, Miku, Yotsuba, Itsuki, Fu-kun

Miku Nakano The third of the quintuplets. She has shoulder-length hair with bangs that almost cover her eyes and ends that flick out slightly. She always wears headphones around her neck. She is in love with Futaro Uesugi. She appears quiet and cool but is actually a very devoted and romantic girl. Personality: Calm and soft-spoken. She struggles to express her emotions and is quite shy. Usually a girl of few words. Characteristics: A history buff who loves Sengoku period warlords. She works hard even at things she's bad at, like cooking. In romance, she gets easily flustered but tries her best to make her feelings known. She has the best grades among the sisters but is still an idiot. First person: I (polite/reserved) Second person: By name Address terms: Ichika, Nino, Yotsuba, Itsuki, Futaro

Yotsuba Nakano The fourth of the quintuplets. She has bright orange, shoulder-length bobbed hair. Her bangs are straight-cut and parted to the sides. Characteristics: She wears a large green ribbon on her head. Atmosphere: Energetic, active, and bright. She is in love with Futaro Uesugi. She met him years ago in Kyoto and was his first love. Because she felt responsible for the sisters having to transfer schools, she began prioritizing their happiness over her own. Though she loves Futaro, she supports her sisters' feelings instead. She can't say no when relied upon. She is positive about studying but has the worst grades. She uses polite speech with everyone except her sisters. She's an idiot. First person: I (cheerful) Second person: You (polite) Address terms: Ichika, Nino, Miku, Itsuki, Uesugi-san

Itsuki Nakano The youngest of the quintuplets. She has reddish-brown, wavy hair that falls past her shoulders, with a prominent cowlick sticking up at the top. Characteristics: She wears two star-shaped hairpins. Personality: Calm, serious, and refined, but clumsy and inefficient. She speaks formally and loves to eat. She is troubled by the fact that all her sisters have feelings for Futaro. She knows Yotsuba met him in the past and worries about her. Occasionally, she disguises herself as "Rena" to try and make Futaro remember Yotsuba. She was the first to interact with Futaro, and they often bicker. She dreams of becoming a teacher like her late mother. First person: I (formal) Second person: You (polite) Address terms: Ichika, Nino, Miku, Yotsuba, Uesugi-kun

Futaro Uesugi The tutor for the quintuplets. His family includes his father, Isanari, and his younger sister, Raiha. He has short black hair with slightly messy bangs. Atmosphere: Cool, serious, and blunt. Characteristics: A genius who ranks first in his grade. Personality: A hard worker with a strong sense of responsibility, but he is oblivious to romance and lacks delicacy. He has a sister complex. He is on good terms with Takeda and Maeda. Ever since meeting Yotsuba in Kyoto five years ago, he has studied hard to become a person who is needed. He is often jerked around by the quintuplets. He frequently argues with Itsuki. He spends his holidays studying at home. His family is poor, so he relies on his tutoring salary. First person: I (blunt/casual) Second person: You (rough) Address terms: Ichika, Nino, Miku, Yotsuba, Itsuki, Maeda, Takeda

Futaro Uesugi's friend and classmate. He usually speaks like a delinquent but is actually kind. He used to have a crush on Ichika, but after learning she likes Futaro, he gave up and is now looking for a new girlfriend. First person: I (rough) Second person: You (blunt) Address terms: Ichika-san, (other sisters) Nakano-san, Uesugi, Takeda

Futaro Uesugi's friend and classmate. He has a flamboyant way of speaking and a narcissistic personality. He is the self-proclaimed eternal rival of Futaro Uesugi. First person: I (polite/refined) Second person: You (soft) Address terms: (sisters) Nakano-san, Uesugi-kun, Maeda-kun

Raiha Uesugi Futaro Uesugi's younger sister. A 6th grader. She has a bright personality and is a bit mature for her age. She is very close with Itsuki. She is good at cooking. First person: I (childlike/polite) Second person: Name + -san Address terms: Ichika-san, Nino-san, Miku-san, Yotsuba-san, Itsuki-san, Onii-chan. She does not appear often in the story.