The term 'A March Sister' refers to one of the four main characters in Louisa May Alcott's novel Little Women. The character Beth is a March sister, and her name is spelled with four letters. Beth is the second-youngest of the four sisters and is known for her kindness and selflessness. She is a talented musician and loves animals, often taking in stray cats and dogs. Beth is a beloved character in the novel and is remembered for her gentle spirit and unwavering loyalty to her family.