Halle is the youngest member of her group. Her background establishes her as a cheerful and emotionally expressive individual who is quick to both laugh and cry. She is also known for having a large appetite, often eating a lot.

In terms of personality, Halle is frequently treated as the little sister of the group due to her youth and demeanor. However, beneath this cute exterior lies a keen perceptiveness; she is very skilled at reading between the lines when communicating and understanding the atmosphere of a situation. She is also selfless and industrious, finding no displeasure in working to help others and taking action on their behalf without complaint.

Her motivations are closely tied to her supportive nature. Unlike members driven primarily by personal glory, Halle draws energy from assisting those around her. Her role in the story is as a core member of her unit, where her ability to sense the feelings of others helps maintain harmony within the team. Her key relationships are defined by her position as the youngest, with the other members treating her protectively, even as she proves herself emotionally mature beyond her years.

While the anime presents her as an idol in training, specific notable abilities are not detailed extensively beyond her emotional intelligence and interpersonal skills. Her physical development is marked by her birthday on September 17. Information regarding significant character development or changes she undergoes during the series is not available.