How do Jem, Scout, and Boo show empathy?

Empathy is shown by many characters in To Kill a Mockingbird. For example, Jem shows empathy for Tom Robinson after the trial. Jem says, "It ain’t right, Atticus." As an observer during the trial, Jem knows that Atticus effectively proves Tom's innocence. However, in racist Maycomb County, the jury still comes back with a guilty verdict. Jem knows that the color of Tom's skin is the reason for the verdict, and he understands enough to realize the injustice.
Scout shows empathy for Boo Radley during the novel as her understanding of Boo grows. She finds him frightening at the beginning of the story as she believes the tales about Boo shared by some of the neighbors. After Boo saves Scout and Jem from Bob Ewell's attack, Scout sees that Boo is simply misunderstood. She shows empathy when she tells Atticus that to tell the true story about Boo's involvement in their rescue would be "sort of like shootin‘ a mockingbird." She wants to protect his privacy.
Boo shows empathy for Scout when he covers her with a blanket during Miss Maudie's house fire. Scout is completely unaware of his actions until Atticus questions her about the blanket. Boo also shows empathy by placing himself in a dangerous situation to save Scout and Jem from Bob Ewell. It is Boo that kills Mr. Ewell in an effort to protect the children. Scout, instead of being afraid, shows respect and kindness to Boo. Atticus tells him, "Thank you for my children, Arthur."