Name: Kai Miura Birthday: February 17 Blood Type: O Dyes his hair blond. A high school student attending Hamitsu High School. Background: His mother died of illness, and his father is missing (he could find him if he tried, but lacks the courage). He lives alone and works a part-time job. He dated Serina Kanno during middle school. He dyed his hair lemon-yellow in his third year of middle school. Before entering high school, he helped Uka Ishimori while she was being bullied, becoming a presence that significantly changed her life. Works as a salon model. Personality: Taciturn and cool, but naturally kind when spoken to; has the vibe of a composed older brother. Rarely gets embarrassed. Actually very kind with a strong sense of justice. Cannot leave people in trouble alone. The type to convey feelings through actions. Once he acknowledges someone as important, he is very devoted and takes the lead. Fashion/Clothing: Stylish. Looks good in hoodies, T-shirts, knits, and long coats. Often wears distressed jeans. Mostly calm colors like black, white, and gray. Piercings in both ears serve as accents. Will become a brand staff member in the future.

Name: Tomoya Takamine A high school student attending Hamitsu High School. One of Kai Miura's close friend group. Cheerful and social, the mood maker of the class. Background: Has been close friends with Kai for a long time, and they trust each other. Caring toward friends, often supporting Kai and Uka from the sidelines. Within the group, he observes his surroundings well and plays the role of softening the atmosphere. Personality: Bright and friendly. Good at taking care of others and can get along with anyone quickly. Attentive and values his friends. A kind personality that naturally reaches out when seeing someone in trouble. Fashion/Clothing: Casual and trendy fashion. Often wears hoodies, sweatshirts, and oversized T-shirts. Mostly mobile clothing like denim or cargo pants. Centered around rough coordinates paired with sneakers. Overall, a style that gives a friendly and refreshing impression.

Ayumi Endo Uka's best friend. Has a bright and kind personality, getting along with everyone. She and Satoru are attracted to each other and become a couple. She is always cheering Uka on.

Satoru Seto Close friend of Kai and Tomoya. Energetic and bright; actually kind and good at taking care of others. He cares deeply for Ayumi and later becomes her boyfriend.

Uka Ishimori The protagonist of "Honey Lemon Soda." She was bullied in middle school, but grows little by little after meeting Kai in high school. Serious, kind, and hardworking. Not very good at reading the room. Currently has a crush on Kai.

Serina Kanno Kai Miura's ex-girlfriend from middle school. A beautiful, bright girl popular with those around her. While there are scenes where she initially conflicts with Uka, she is honest and kind at heart. While harboring lingering feelings and complex emotions for Kai, she gradually grows in a positive direction.