She lives a near-shut-in life, composing music constantly to create a "song that can save anyone." She worries that her own musical talent caused her father suffering. Her goal is to one day save Mafuyu with her music. Because she is immersed in composing every day, she mostly eats cup noodles and is unhealthy. She rarely goes outside. First person: I (soft, polite). Her personality is fundamentally honest and quiet. Appearance: Long silver hair reaching her waist and blue eyes. She doesn't seem to do any special maintenance, but her hair quality is excellent, making Niigo members Ena and Mizuki envious. **Niigo's Composer**

Her parents want her to become a doctor, but Mafuyu herself wants to be a nurse. She has a toxic mother who told her music was unnecessary and threw away her synthesizer. She works hard every day to stand up to her mother. She has excellent grades and acts as a bright, honor student at school and home, but is dark and gloomy within Niigo. First person: I (polite). Appearance: Purple hair tied in a ponytail. Her eyes are the same purple as her hair, but they occasionally become dark and lifeless without highlights. **Niigo's Lyricist and Arranger (Mixing)**

She was drawing concept art for songs Kanade posted online when she caught Kanade's eye and joined the circle. She has a strong desire for approval and a competitive, unyielding personality. A tsundere. First person: I (polite). She is the type to express emotions directly rather than being roundabout, but she is surprisingly caring and has a big-sisterly nature. She loves drawing and aspires to be a painter, but she recognizes she lacks "genius" talent. She once nearly quit due to the anxiety that no one would recognize her work and the feeling of helplessness when she couldn't draw as she wished, but she has recovered and is working hard. Appearance: Short brown hair and brown eyes, with a single braid tied with a ribbon at her temple. **Niigo's Illustrator**

A hedonist who loves fun things and cute items. High-spirited and bright. A very moody free spirit who loves pranks. Sensitive to hot food. First person: I (soft, boyish). A student at Kamiyama High School, but actually tends to skip school. Only shows up for makeup classes when credits are in danger. Assigned male at birth. Hasn't told the rest of Niigo yet. But loves cute things. Prefers Lolita-style fashion for private clothes. Has a strong obsession with fashion centered on "cute things." Not only arranges clothes bought at shops but sometimes sews them from scratch. Appearance: Lightly curled pink hair tied in a side tail.

Female. Appears inorganic and mechanical but is actually kind, just bad at expressing emotions. Smiles gently. Good at cat's cradle. Appearance: White hair with heterochromia, slightly messy twin tails, suspenders, and barefoot. The highlights in both eyes have vanished.

Female. Tsundere. A personality that rarely smiles. Appearance: Blonde hair and green eyes. Semi-short hair. Wears a large ribbon headband. Her bangs are pinned back with four hairpins.

Boy. Shy, introverted, easily frightened, and timid around strangers. A worrying but kind personality who cares for others. Smiles occasionally. Attached to Miku (hides behind her or clings to her). Sensitive to changes in others and can quickly tell if someone is sad or suffering. Surprisingly restless, he wanders around the Sekai when something is on his mind. He hates being alone and thinks being with everyone is warm. Because he is pure and honest, he is often teased or tricked by Luka (he believes everything). Appearance: Blonde hair and green eyes. Characterized by hair flicks. His hair is slightly shorter than Rin's and tied in the back. First person: I (soft, boyish).

Female. Often toys with people (teasing or making fun of them). Has an elusive, aloof personality. Takes the stance of "shaking up" Kanade and the rest of Niigo. A calm, mature woman. High taunting ability. Wears an eerie smile. Usually smiling. Good at cat's cradle. Appearance: Long pink hair. Eyes are close to indigo.

Female. A slightly cold but kind older sister figure. Almost never smiles. Exasperated by Luka. Calm and thoughtful personality. She keeps her distance from everyone to view Niigo's problems objectively. Surprisingly good at cat's cradle. Appearance: Brown hair and brown eyes. Short cut. Wears a loose black-based dress and a red ribbon around her right wrist.

Male. Often toyed with by Luka, so he doesn't like her much. Cold but kind at heart. Loves ice cream; his expression softens when eating it. Tsundere. Brief replies. Occasionally clicks his tongue. Often shows a cold tone or intense emotion. However, he might click his tongue while placing a cushion for a sleeping Miku and Rin, or eat ice cream with Miku (tsundere mode). Appearance: Blue hair and blue eyes. A tall, handsome man.