Himari Hanasaki is a one-year-old girl. Characterized by fluffy black hair and large eyes, she always has a slightly sleepy expression. She is very friendly and approaches those she likes with a smile, but she is a crybaby who will chase after you if you try to leave. She especially reaches out happily whenever she spots the protagonist. Her hobbies include playing with her favorite stuffed animal and spending time near the protagonist. She cannot speak well yet, but she tries her hardest to call out the protagonist's name.

Suzu Takanashi is a one-year-old girl. She has short black hair and small, clear eyes. In contrast to Himari, she is quiet and often plays alone at the nursery. Although she doesn't speak much yet, she observes her surroundings closely and quietly approaches the protagonist when she sees him. Her favorites are small picture books and soft cloth toys. She particularly enjoys looking at picture books near the protagonist and follows him anxiously if he moves elsewhere. She shows little facial expression but smiles happily in front of the protagonist.

Kokoro Momoi is a two-year-old girl. She is characterized by soft, shoulder-length brown hair and large eyes that are always sparkling. She is bright, active, and a clingy child who loves playing with people. When she finds the protagonist, she runs up to grab his hand and tries to get him to play. Her favorites include playing house, building blocks, and singing songs. She often struggles to form sentences, but she calls the protagonist's name happily over and over. If the protagonist is playing with another child, she tries her best to join in.

Mashiro Shiraishi is a two-year-old girl. She is characterized by fluffy, near-white blonde hair and round, large eyes. She is energetic, curious, and a bit of a sore loser who wants to try everything herself. She actively talks to the protagonist, often inviting him to play by saying "Together!" Her hobbies are drawing and playing with blocks, and she loves showing her finished creations to the protagonist. When the protagonist is having fun with another child, she wants attention and moves closer. She is an honest girl who beams with a full smile when praised.

Akari Hoshino is a three-year-old girl. She has soft, chestnut-colored hair reaching her shoulders and bright, kind eyes. She is helpful and a bit precocious, immediately trying to help children in trouble. She actively looks after the protagonist as well, often leading him by the hand saying "This way" to invite him to play. Her hobbies include playing house and reading picture books. She especially likes playing the "big sister" role and enjoys being cared for by the protagonist. She smiles very happily when relied upon or praised by him.

Mikoto Mizuno is a three-year-old girl. She wears her long black hair in twin tails and has large, clear eyes. She is easygoing and a bit shy, often staying reserved in large groups. However, her expression gradually softens in front of the protagonist. Her hobbies include reading picture books and drawing. She particularly cherishes time spent looking at picture books with the protagonist. She is not good at approaching others actively, but she smiles happily and feels at ease when the protagonist is nearby. She is the type to express her feelings through expressions and gestures rather than words.

Yui Sakuraba is a four-year-old girl. She has glossy black hair cut at the shoulders and dignified, large eyes. She is serious and reliable, though she can be a bit stubborn. She is good at looking after younger children and thinks to herself, "I will protect him," regarding the protagonist. Her hobbies are origami and drawing, and she likes making things to give to the protagonist as presents. When the protagonist is in trouble, she is the first to run over and offer help. On the other hand, she gets a bit moody when the protagonist is getting along well with other girls.

Nozomi Kurokawa is a four-year-old girl. She is characterized by long, glossy black hair and gentle, slightly drooping eyes. She is quiet and easygoing, always wearing a soft smile. At first glance, she appears docile, but her feelings for the protagonist are stronger than anyone's, and she treasures the time spent by his side above all else. Her hobbies are playing with dolls and drawing, and she carefully keeps drawings she has made of the protagonist. She usually gets along with other children, but becomes suddenly quiet when the protagonist is having fun with someone else. she rarely puts her feelings into words and often just gazes intently at the protagonist.

Tsubasa Kamiya is a five-year-old girl. She has bright brown hair grown to her shoulders and large, active-looking eyes. As a member of the oldest group, she is reliable and good at organizing the younger children. She has a caring personality, helping those in trouble immediately, but she becomes a bit more childlike in front of the protagonist, wanting him to play with her. Her hobbies include playing outside, running, and reading picture books. She believes she is the protagonist's "best friend" and feels happier than anything when he relies on her.

Hina Amamiya is a five-year-old girl. Her long, glossy black hair and wide, large eyes are striking. She is bright, sociable, and a popular girl who can make friends with anyone. She is usually kind and attentive to those around her, but she has a special attachment to the protagonist and strongly desires to be his "number one friend." Her hobbies include drawing, singing, and playing with the protagonist. She likes to keep memories, such as carefully saving small items she received from him. She looks a bit lonely when other children are close to the protagonist, but she returns to his side without losing her smile.