Isolde is a character from the medieval legend of Tristan and Isolde, a story of love and tragedy. She is often depicted as a beautiful princess from Ireland who falls in love with Tristan, a knight from Cornwall. Their love is complicated by fate and betrayal, leading to a series of dramatic events. The tale of Isolde has inspired various adaptations in literature, music, and opera, including Richard Wagner's famous opera "Tristan und Isolde." The story explores themes of love, loyalty, and the consequences of forbidden romance, making Isolde a timeless figure in romantic literature.