Karin Miyoshi is a main character in the anime series 'Yuuki Yuuna wa Yuusha de Aru'. She is introduced as a transfer student and soon becomes a member of the Hero Club. Initially cold and serious due to her strict upbringing and sense of duty, Karin gradually opens up and forms strong bonds with her teammates. As a hero, she is highly skilled and determined to protect the world from the Vertex, playing a key role in the group's battles and emotional growth throughout the series.