Yusa was born as Yusa Kurobane and grew up with her older sister, Misa Kurobane. The two were very close, but after Misa’s tragic death, Yusa unknowingly developed the ability to channel spirits, which caused Misa to occasionally take over her body.

Unaware of her ability at first, Yusa continued pursuing her dream of becoming an idol, eventually rising to stardom as the lead singer of How-Low-Hello under the stage name Yusarin. However, her spirit channeling ability eventually drew the attention of those seeking to exploit ability users, making her a target.

To protect her, the Hoshinoumi Academy Student Council, led by Nao Tomori, recruited her, and she soon became a member of the team, assisting in locating and safeguarding other ability users while juggling her career as an idol.

Yusa has long, light blonde hair tied into twin tails, bright sky-blue eyes, and a cute, youthful face, fitting her idol image. Her signature accessory is a heart-shaped hairpin, which complements her cheerful and energetic personality.

She wears a pink frilly dress when performing as Yusarin but switches to the Hoshinoumi Academy uniform a red blazer, white blouse, and black skirt when performing Student Council duties.

When possessed by Misa, her appearance remains the same, but her eye color changes to red, and she gains a more aggressive expression and demeanor.

Yusa is bright, innocent, and extremely cheerful, often acting as the energetic and airheaded member of the Student Council. She is kind-hearted, naive, and always eager to help, making her one of the most approachable and likable characters in the series.

She also has a natural charisma, which contributes to her idol success, as fans are drawn to her sweet and adorable personality. However, her naivety sometimes leads her to misunderstand situations, making her the target of gentle teasing from her friends.

Whenever Misa takes control of Yusa’s body, her personality flips completely she becomes loud, blunt, and aggressive, often scaring people with her fiery temper and tendency to insult others. Despite her rough nature, Misa is incredibly protective of Yusa and cares deeply about her. Yusa herself has no memory of what happens while possessed, making for hilarious moments when she suddenly snaps back into control, completely oblivious to Misa’s actions.

• Joining the Student Council
  Yusa is recruited by Nao Tomori and Jōjirō Takajō after her ability becomes a liability, as people seeking to exploit ability users start targeting her. Though she is not a fighter, she agrees to help the Student Council in their mission.

• Balancing Her Idol Career and Student Council Duties
  Throughout the series, Yusa struggles to balance her idol activities and supernatural responsibilities, often switching between the two worlds with comedic results. Her idol persona, Yusarin, is adored by Jōjirō, who frequently geeks out over her presence, leading to several hilarious moments.

• Possessions by Misa
  Misa occasionally takes over Yusa’s body, particularly in dangerous or high-stress situations, using her pyrokinesis to fight enemies or express her frustration at those who threaten Yusa. Though Yusa is completely unaware of these possessions, Misa’s presence serves as a source of both comedic chaos and emotional depth, especially when dealing with the theme of sibling bonds and loss.

• Final Goodbye to Misa
  As Yuu Otosaka’s power grows, he eventually gains the ability to permanently remove supernatural abilities. Knowing this, Misa decides to say her final farewell to Yusa, allowing herself to pass on peacefully rather than remaining as a spirit. Though Yusa never fully realizes the significance of Misa’s departure, this moment serves as one of the most emotional parts of her character arc, showing the strength of their sisterly bond.