Matama Akoya is a fourteen-year-old member of the villain organization Enormita, also known as the Lord Squad, and she transforms into the combat form Loco Musica. She operates under the stage name Utaboshi Pearl. In her civilian appearance, she has maroon hair with cyan highlights and stands 157 centimeters tall. Her birthday is April 8th. Matama deeply aspires to become an idol and is passionate about singing, but she is notably tone-deaf in her everyday state. This gap between her dream and her natural lack of skill is a defining part of her character. However, when she is pushed to her limits in battle, she can unlock a stunning and powerful vocal ability that allows her to deliver effective attacks. As Loco Musica, her transformed appearance has a sailor motif, and she uses sound waves generated through her singing as her primary method of offense. Matama is described as having a fiery personality, and her motivations center on her desire to be a successful performer, which she pursues within the context of her role as a villain. In the story, she participated in a battle against Kii Aragaki's transformed form, Leopard, where she emerged victorious, forcing Leopard to flee with Nero Alice's help. A notable event in her development involved Leberblume using her Shadow Puppet ability to create fake fans to cheer for Loco Musica during a performance, highlighting the artificial and manipulative environment that can surround her idol ambitions. She is a recurring member of Enormita, and her relationships within the group are defined by her pursuit of her idol dreams, though she often clashes with her own limitations.