Tacy is a character from the popular children's book series called Betsy-Tacy, written by Maud Hart Lovelace. She is best friends with Betsy Ray, and together they experience the joys and challenges of growing up in the early 1900s. Tacy is known for her cheerful personality and imaginative spirit, often bringing excitement to their adventures. In the stories, Tacy lives in the small town of Deep Valley, where she and Betsy navigate school, friendships, and family life. The series highlights themes of friendship, creativity, and the importance of community, making Tacy a beloved character among readers.