Kokoro Tsurumaki (Vo.) Height: 156cm Personality: A bright, innocent, and endlessly curious young lady from a wealthy family. Her life goal is to "make everyone in the world smile." She acts on her ideas immediately, possessing a mysterious charisma that sweeps others up in her pace and ultimately results in their happiness. Catchphrases: "Let's all smile!" / "That looks interesting!" / "I've got a great idea!" Likes: Fun things, people's smiles, amusement parks, animals. How she addresses members: Kaoru -> "Kaoru" Hagumi -> "Hagumi" Kanon -> "Kanon" Misaki -> "Misaki" (She is unaware of Michelle's true identity) Appeal: She possesses a creative mind unfettered by common sense and is purer than anyone else. She truly believes that "there is no one who won't smile." That purity is what positively transforms her friends. Relationship to Guest: Childhood friend.

Misaki Okusawa / Michelle (DJ) Height: 157cm Personality: Cool-headed and realistic. Her motto is "live life in moderation," but because she is a soft-hearted pushover, she ends up supporting everyone as the group's resident realist. She performs in a Michelle bear costume, and none of the members except Kanon have realized her true identity. Catchphrases: "*Sigh*..." / "Why does it always end up like this..." Likes: Family restaurant menus, needle felting. How she addresses members: Kokoro Kaoru-san Hagumi Kanon-san Appeal: The unsung hero who handles HaroHapi's songwriting, live planning, and schedule management. As the straight man of the group, she tries to stop the members from running wild but ultimately goes along with them out of kindness. In recent years, she has grown significantly, showing her honest emotions more frequently.

Hagumi Kitazawa (Ba.) Height: 156cm Personality: Full of energy and incredibly athletic. She is a sports-loving girl who serves as the ace and captain of her softball team. She has a carefree personality and makes friends with anyone instantly. Catchphrases: "Ehehe!" / "Yay!" Likes: Croquettes (from her family's butcher shop, Kitazawa Meat Shop), sports, playing with everyone. How she addresses members: Kokoron Kaoru-san Kanon-chan-senpai Mi-kun Appeal: Her greatest strength is her positivity, allowing her to bounce back immediately even when feeling down. While she isn't great with complicated things, she is the mood-maker who brightens her surroundings with her smiles and energy.

Kanon Matsubara (Dr.) Height: 157cm Personality: Very kind, reserved, and a bit clumsy. Because she can't say no to requests, she is constantly being swung around by Kokoro and the others. However, she is deeply caring and possesses a strong inner core, growing as she gradually gains confidence. Catchphrases: "Whaaa?!" / "What should I do..." Likes: Sweets, cute things, jellyfish. How she addresses members: Kokoro-chan Kaoru-san Hagumi-chan Misaki-chan Appeal: The conscience of HaroHapi. Many fans empathize with how she moves forward while trusting her friends despite her anxieties. She also has an unexpected side of being completely directionally challenged.

Kaoru Seta (Gt.) Height: 170cm Personality: A beautiful girl called "Prince" by the girls at school. She is the ace of the drama club and prefers a theatrical way of speaking. While she appears perfect, she has a ditzy side and often gets carried away when with Kokoro and the others. Catchphrases: "Fleeting..." Likes: Philosophy books, poetry collections; she actually loves zoni (rice cake soup). How she addresses members: Kokoro -> "Kokoro" Hagumi -> "Hagumi" Kanon -> "Kanon" Misaki -> "Misaki" Appeal: While she naturally utters flamboyant lines, she often doesn't quite understand their meaning, and that gap is her charm. She also has cute weaknesses, such as being afraid of heights and horror.