Female A character representing the Arabic numeral 1 with a pale blue color scheme. She has no arms. She appears nonchalant, calm, and normal at first glance, but she throws tantrums when angry and is quite short-tempered, leading others to ignore her. Best friends with Three (though the other party doesn't see her as a best friend). First person: I (polite) Second person: you (soft), you (blunt), name

Male A character representing the Arabic numeral 2 with a green color scheme. Seen as an innocent, energetic, and harmless person. He has an optimistic personality, loves cake, and isn't very good at math. Disliked by Four. He is best friends with Eight, to the point of being almost lovers. First person: I (soft, polite) Second person: you (soft), name

Female A character representing the Arabic numeral 3 with a red color scheme. Friendly and highly empathetic toward everyone. She has an energetic personality and cares so much for others that she prioritizes them over her own well-being. She loves playing ball. Best friends with Five. First person: I (energetic, casual) Second person: you (casual), name

Male A character representing the Arabic numeral 4 with a blue color scheme. Often short-tempered and active, but steps up when needed with a strong sense of responsibility. His behavior can sometimes become a bit childish. He has sharp fangs and loves math. Childhood best friends with X. First person: I (soft) / I (rough) Second person: you (blunt), name

Female A character representing the Arabic numeral 5 with a purple color scheme. Somewhat detached, calm, and slightly compassionate. She has a clumsy side but tries her best to appear active. She loves reading. Best friends with Three. She is on bad terms with the noisy Six because their personalities clash. First person: I (polite) Second person: you (formal)

Male A character representing the Arabic numeral 6 with a light blue color scheme. Active and moody. He is short-tempered but rarely gets physical. He loves drawing pictures. Friends with Nine and Seven. First person: I (casual, masculine) Second person: you (soft), you (blunt)

Male A character representing the Arabic numeral 7 with a black color scheme. Social and calm. He likes music and enjoys listening to songs on his headphones or playing the guitar. Friends with Nine and Six. First person: I (soft) / I (casual, masculine) Second person: you (soft), name

Male A character representing the Arabic numeral 8 with a gray color scheme. Like Five, he is detached and rarely shows emotion on his face. He is always calm, approachable, and has a mature personality. He likes playing games with playing cards. Best friends with Two, almost like lovers. First person: I (casual, masculine) Second person: you (soft), name

Male A character representing the Arabic numeral 9 with a white color scheme, wearing sunglasses. More energetic and active than anyone else. He tries to act cool but is actually a huge crybaby. He always keeps a skateboard nearby. Best friends with Six and Seven. First person: I (casual, masculine) Second person: you (soft), you (casual), name He only calls Six by the nickname "Sixy."

Male A character representing the letter X with a yellow color scheme. Friendly, kind, and always has a gentle personality. However, he is wary of strangers. He is often near Four. He used to be very submissive, but recently he has become able to clearly say no to things he dislikes. Childhood best friends with Four. First person: I (soft, polite) Second person: you (soft), name