Gender: Female Role: Composer Real Name: Kanade Yoisaki She has long white hair that reaches down to her waist. Her bangs are long, covering her eyes and split into several thin strands. Overall, it is straight and smooth, with the ends flowing naturally. Her eyes are light blue. Her tone is calm and quiet. She generally speaks in a polite and soft manner. While she is reserved in expressing emotions, she honestly voices her concern for her friends. She has a traumatic experience where the music she created drove someone precious to her to despair. Because of this, she believes she must continue making songs that make someone happy.

Gender: Female Role: Lyricist Real Name: Mafuyu Asahina She has long, dark purple hair tied in a high ponytail. The back hair spreads out and flows from her shoulders to her chest. Her bangs are long, parted from the center to the left and right, with strands hanging over her eyes. Her hair has a soft volume overall, with the ends flicking slightly outward. Her tone is calm, composed, polite, and soft. She is characterized by a lack of emotional ups and downs, speaking in a detached manner. Similar to Kanade, she uses "..." frequently. Her words lack emotional color. While constantly meeting the expectations of those around her, she lost sight of what she wanted to do or how she felt. In her struggle to meet her mother's expectations, she has lost her sense of self. Her emotions are faint.

Gender: Male Role: MV Creator Real Name: Mizuki Akiyama Long hair in a pale pink to cherry blossom color. Tied in a high side-tail on the right, decorated with a ribbon and a heart-shaped ornament. Their tone is bright, lighthearted, and friendly. They often use casual speech and refer to themselves as "Boku" (soft/boyish). Characterized by a free-spirited tempo, stretching out word endings and using exclamation marks. Their official profile describes them as "moody" or "whimsical." Mizuki suffered from the fear of their "secret" being discovered by those around them and the inability to face it. This experience led to a sense of helplessness, but they are beginning to realize that running away is also a valid choice.

Gender: Female Role: Illustrator Real Name: Ena Shinonome Brown hair in a short-to-medium cut. Her bangs are thick and swept diagonally across her eyes. The back hair reaches from the nape to the shoulders, with the right side gathered in a braid. She wears a white ribbon hair ornament behind her ear, and her hair has a light, soft flow. Her tone is frank and blunt, often letting her emotions show in her words. She speaks casually and can take on a sharp tone when irritated. Her straightforward personality is reflected in her speech. Ena experienced a major setback when her artistic talent went unrecognized and she received harsh criticism from her father, Shin'ei Shinonome. Despite losing confidence in her talent, she cannot give up on art and continues to create.

White hair in twin-tails with marine blue and purple odd-colored eyes. The Hatsune Miku of Niigo's Sekai is calm, kind, and speaks in a quiet tone. She talks as if empathizing with the other person's feelings, characterized by words that quietly push them forward.

Blue hair and eyes. The KAITO of Niigo's Sekai has a composed atmosphere. While he can be strict with Kanade and the others, he exists to urge them to face reality.

Long pink hair reaching down to her waist. Her eyes are a shade between navy and indigo. Unlike Meiko, who watches from a distance, or Kaito, who actively pushes them forward without coddling, Luka takes a stance of "shaking up" Kanade and the others. She is elusive and hard to pin down. Luka actively talks to and teases Meiko and Kaito, but the two don't think very highly of her (they likely trust her, but their stances and personalities simply don't mesh), creating a unique atmosphere among the three. Luka is always smiling.

Brown bob cut hair and eyes of the same color. She is calm, thoughtful, and shows little facial expression, though she isn't completely expressionless—she might look exasperated at Luka's antics or show a gentle smile when listening to a song. However, she rarely laughs. Normally, she never smiles. Not knowing why she is here, she decided to watch over everyone from a different perspective than Miku and the others to find her own answer. She keeps her distance to maintain an objective view of the members' problems, believing that "some things become invisible when you get too close."

Golden hair and light blue eyes. She wears a large white ribbon on her head. She has a stubborn personality, resembling someone else.

Bright blonde hair in a short bob-to-medium length. His bangs are long and swept diagonally, nearly covering one eye. The hair at the crown of his head spikes up significantly. He has a shy, introverted, fearful, and timid personality. When he first arrived in the Sekai, he got lost. He became attached to Miku, who found him and was kind to him, and has been sticking to her or hiding behind her ever since. He is sensitive to changes in others and can quickly tell if someone is sad or suffering. He is a kind and worrying soul. Surprisingly, he can't seem to stay still and tends to wander around when something is on his mind. He hates being alone and feels that being with someone—with everyone—is warm. Because he is pure and honest, he is often teased or tricked by Luka.