Keiji Abuto serves as an antagonistic figure within the narrative, operating as an unscrupulous talent scout for the entertainment industry. His role in the story is defined by a cynical and manipulative approach to discovering and managing musical acts. Abuto is known for his willingness to exploit young female singers, using them for his own purposes and then discarding them when they no longer serve his needs.

To maintain control over these individuals, Abuto employs a specialized piece of technology in the form of a collar, which he uses to directly influence and command people. This method of control reflects his character's pragmatic and ruthless nature, showing that he values utility and obedience over any sense of loyalty or artistic integrity. His actions create significant conflict for the main characters, as his practices directly oppose their more earnest ambitions in the music world. While detailed information about his background, personal motivations, key relationships, or any potential character development is not available, his established portrayal as a heartless manager who uses coercive technology defines his primary function as an obstacle within the story.