Fern Arable is a young girl who plays a central role in the children's novel "Charlotte's Web" by E.B. White. She is compassionate and caring, especially towards animals. When she discovers that her father plans to kill a runt piglet, she persuades him to let her keep it, naming the pig Wilbur. Fern forms a strong bond with Wilbur, nurturing him as he grows. Her love for animals and her determination to protect them highlight her character's kindness and innocence. Throughout the story, Fern represents the themes of friendship and the importance of empathy towards all living beings.