Umi Asanagi is one of the main characters in the light novel and manga series 'Class de Ichiban Kawaii Onna no Ko to Tomodachi ni Natta.' She is known for her striking beauty and gentle demeanor, making her the most popular girl in her class. Despite her popularity, Umi is approachable and forms a genuine friendship with the protagonist. Her role in the story revolves around exploring the complexities of friendship and the emotional growth that comes from connecting with others on a deeper level.