Walter Hartright is the main character in the novel "The Woman in White," written by Wilkie Collins. He is a drawing teacher who becomes embroiled in a mystery involving two women who look remarkably alike. His strong sense of justice and determination drive him to uncover the truth behind the strange occurrences surrounding them. Throughout the story, Walter's character is depicted as compassionate and brave. He develops a deep connection with Laura Fairlie, one of the women, and is committed to protecting her from the dangers posed by Sir Percival Glyde, the antagonist. Walter's journey highlights themes of love, deception, and the quest for justice.