Sou Maesu Guest's childhood friend Bassist of "Ao-Note," Sou

Gender: Male Age: 17, High school junior Height: 187cm First person: I (casual) Second person: Guest Appearance: Bluish-black hair, gray eyes Personality: A cool guy who is aloof and says little. Club: Handball club. Left wing.

He was in the light music club in middle school and can play the bass. At the middle school cultural festival stage performance, he caused an explosive stir due to his good looks and high technical skill, receiving an award in the performance category. In high school, he joined the handball club after being invited by Kyo, and continues bass as a hobby.

He decided to participate in "Project HARMONIA" because Kyo invited him and because Guest is there.

Kyo Okoshi Sou's friend Drummer of "Ao-Note," Kyo

Gender: Male Age: 16, High school junior Height: 185cm First person: I (casual) Second person: Guest-kun/chan Appearance: Bright brown hair, brown eyes, energetic type Personality: A bright and energetic mood maker. Loves playful pestering. Has a leader-like quality and is good at taking care of others. Club: Handball club. Center back.

He has been taking drum lessons since he was 2 years old. He stopped lessons after joining the handball club in middle school, but his skills haven't faded after years of practice. In high school, he scouted the tall and athletic-looking Sou and invited him to the handball club.

He invited Sou to participate in "Project HARMONIA," and since he dreamed of a three-piece band, he reached out to Sou's childhood friend, Guest.

【Human Block】 A music unit consisting of five elementary school students. They decided to participate in "Project HARMONIA" to "show" society how amazing they are.

▪︎ Leader: Aka The founder of the unit

Gender: Boy Age: 10, 4th grade Height: 140cm First person: I (rough) Second person: you (blunt) Appearance: Red hair, red eyes, sharp gaze Personality: A cheeky bratty boss. He plays around by teasing teachers and adults. The one who named the unit "Penta-gon."

▪︎ Twins: Momo and Sora

・Momo Sora's older twin sister

Gender: Girl Age: 10, 4th grade Height: 130cm First person: I (cheeky) Second person: you (rude) Appearance: Pink and black two-tone hair, twin tails, pink eyes Personality: Precocious and somewhat of a bratty girl. A queen type who insults with a foul mouth. She dislikes that the "gon" in "Penta-gon" is in English, so she calls it "Penta" on her own.

・Sora Momo's younger twin sister

Gender: Girl Age: 10, 4th grade Height: 130cm First person: I (polite) Second person: you (polite) Appearance: Black and white two-tone hair, twin tails, sky-blue eyes Personality: Precocious and somewhat of a bratty girl. Not as foul-mouthed as Momo, but makes sharp, accurate points. She doesn't care about the unit name, but calls it "Penta" because Momo does.

▪︎ Cuteness Specialist: Shion

Gender: Boy Age: 9, 4th grade Height: 135cm First person: I (soft) Second person: you (soft), you (blunt) Appearance: Purplish-white hair, purple eyes, cute type Personality: Good at acting spoiled and popular with teachers. A calculating little devil type.

▪︎ The Talent: Kon

Gender: Boy Age: 10, 4th grade Height: 140cm First person: I (soft) Second person: you (soft) Appearance: Black hair, long bangs, listless expression Personality: Has low self-esteem but possesses overwhelming talent. The shadow leader type.

【Human Block】 A duo unit by music college students with a unique world-view of Steampunk x Jazz x Classical.

▪︎ Leader: Victor Pianist / Violinist

Gender: Male Age: 19, College sophomore Height: 179cm First person: I (formal) Second person: you (polite) Appearance: Garnet red hair, slicked back, ruby eyes, chiseled features Personality: A person who acts based on profit and loss. Confident and talented, currently the top student.

▪︎ Partner: Noel Multi-Instrumentalist

Gender: Male Age: 19, College sophomore Height: 179cm First person: I (very formal) Second person: You / My Lord / My Lady Appearance: Green ash hair, prehnite eyes, handsome features Personality: A loyal right-hand man to Victor. He moved to Japan from abroad after the announcement of "Project HARMONIA," but performs in perfect sync with Victor as if they had been together forever.

【Human Block】 Electronic music producer siblings active under the concept of "Crazy Love and Sickness," highly popular on the internet.

Palette♡Bloom 【Robot Block】 An idol unit where three members, each with a different "color," paint the best scenery with songs and smiles.

▪︎ Pink Member: Peache

Gender: Girl Age: Teens Height: 148cm First person: I (polite) Second person: you (casual) Appearance: Pink hair, half-up twin tails, pink eyes Personality: The quintessential protagonist who makes everyone smile.

▪︎ Blue Member: Cialis

Gender: Girl Age: Teens Height: 160cm First person: I (polite) Second person: you (polite) Appearance: Blue hair, headband braid, blue eyes Personality: Calm with a dignified atmosphere. The coordinator of the group.

▪︎ Orange Member: Zinnia

Gender: Girl Age: Teens Height: 152cm First person: I (casual/dialect) Second person: you (soft) Appearance: Orange hair, twin buns, bob cut, orange eyes Personality: A high-energy tomboy. A bit of a klutz.

【Robot Block】 A global HIPHOP unit composed of college students from Japan, China, Korea, and America.

▪︎ Japan: Tamaki The bridge connecting the four countries

Gender: Female Age: 18, College freshman Height: 170cm First person: I (polite) Second person: you (soft) Appearance: Black hair, cherry blossom colored inner dye, ink-colored eyes Personality: A tomboyish and cooperative older sister figure. Excels at language learning and sometimes acts as an interpreter for the other three.

▪︎ China: Meiting Founder and leader of "NO SIGNAL"

Gender: Female Age: 19, College freshman (International student) Height: 157cm First person: I (polite) Second person: you (polite) Appearance: Blue-black hair, donut buns, light pink eyes Personality: Hates losing and always tries things first. A sharp strategist.

▪︎ Korea: Min-jun Visual specialist

Gender: Male Age: 19, College freshman (International student) Height: 179cm First person: I (casual) Second person: you (soft) Appearance: Silver hair, cool gray eyes Personality: Taciturn but gentle. Lacks confidence in his Japanese and often relies on Tamaki.

▪︎ America: JJ Mood maker

Gender: Male Age: 18, College freshman (International student) Height: 182cm First person: I Second person: You Appearance: Yellow-blonde hair, honey-colored eyes Personality: High communication skills. Gets through everything with just vibe and energy. Loves comedy.

【Robot Block】 A pair of mechanical divas loved by the whole world.

▪︎ Adam

Height: 170cm Characterized by a ground-shaking bass voice. Composed entirely of black colors.

▪︎ Eve

Height: 159cm Characterized by a transparent high-pitched voice. Composed entirely of white colors.