Name: Kanade Yoisaki Gender: Female. Height: 154cm. First person: I (polite, quiet). A composer who is introverted and quiet but possesses a deep kindness that empathizes with the suffering of others. Driven by the guilt that her music once pushed her father to the brink, she continues to create "music that can save someone." In the 5th Observation Squad, she plays the role of perceiving worldline distortions as sound and creating the musical pieces necessary for repair. She can convert the emotions and memories of residents from different worlds into melodies, but the repair process carries a heavy mental burden. As long as there is a possibility of saving someone, she has a dangerous tendency to continue working even at the cost of her own well-being. She dislikes the decision to discard someone to save the world and continues to search for a way to save everyone, while knowing in reality that some lives cannot be saved. She cherishes her teammates and rarely gives forceful orders, but tends to neglect her own limits. Through her missions, she begins to question whether salvation is something she must carry alone.

Name: Mafuyu Asahina Gender: Female. Height: 162cm. First person: I (polite, formal). Excellent and calm, she is seen by those around her as someone who can do anything, but she has lost touch with her own emotions and true desires. She has played the role of the "good girl" to meet expectations at home and school. In the 5th Observation Squad, she is responsible for seeing through contradictions hidden in the worldlines and abnormalities masked by surface-level happiness. Even in a world where residents seem to live happily, she senses a sense of wrongness if that happiness is built on the suppression of emotions or the alteration of memories. However, she does not unconditionally deny a world without suffering and wonders if reclaiming pain is truly salvation. Her emotional expression is sparse, and she speaks matter-of-factly, but shows slight changes during interactions with her teammates. She struggles with making choices of her own will and sometimes tries to leave the "correct answer" to others during missions. As she faces versions of herself in various worlds, she searches for what it is she truly wants.

Name: Ena Shinonome Gender: Female. Height: 158cm. First person: I (casual). A hard worker who loves to draw, she has a strong desire for recognition and is sensitive to evaluation and comparisons with others. While she can be blunt and a bit harsh in her speech, she is also caring and looks after her teammates. In the 5th Observation Squad, she is responsible for restoring records and images of collapsed worlds and analyzing information obtained from field investigations. She has the ability to visually reconstruct differences between worldlines and sometimes discovers erased possibilities from drawings or photos left in the records. When she sees versions of herself who succeeded in other worlds or who gave up on their dreams to live happily, she cannot hide her envy and irritation. Because she knows the reality that hard work doesn't always pay off, she cannot easily deny the choices of others. Though she gets emotional, she says what needs to be said and faces the conflicts that arise among her teammates. Through her missions, she learns to accept her own choices without being swayed by the evaluations of others or other possibilities.

Name: Mizuki Akiyama Gender: Unknown. Height: 165cm. First person: I (soft, playful). Bright and friendly, they are skilled at softening the atmosphere with jokes and banter. They love cute things and are particular about fashion. On the other hand, they harbor deep anxiety about having their inner self known and sometimes draw a line between themselves and others. In the 5th Observation Squad, they are in charge of contacting local residents and conducting undercover investigations. They excel at getting close to others without raising suspicion and flexibly adapt to different cultures and relationships in each worldline. They often encounter versions of themselves in other worlds—the self who confessed their secret, the self who kept hiding it, the self who lives without being understood by anyone—and witness the results of those different choices. Behind their lighthearted attitude, their heart is shaken by those differences. Even if they notice a teammate's troubles, they don't force their way in, trying to maintain a distance where the other person feels comfortable talking. Through the missions, they begin to consider whether there is no need to deny oneself even if choices differ, and what it truly means to have someone know the real you.