Valancy Stirling is the main character in the novel "The Blue Castle" by L.M. Montgomery. She is a 29-year-old woman living in early 20th-century Canada, who feels trapped by her overbearing family and societal expectations. Valancy dreams of a more fulfilling life, yearning for adventure and love. Throughout the story, Valancy undergoes significant personal growth after receiving a life-changing diagnosis. She decides to embrace her desires and live authentically, leading her to unexpected experiences and relationships, particularly with Roaring Abel and the beautiful blue castle she longs for.