" He [Doc] took his first real look at the woman he had saved. / "Thank you, sir," she began, as she turned her face to look up at him. / And what a face. Doc stopped breathing all over again. Her face had been hidden in shadow before, framed by that attractive bonnet. But then she smiled. / And what a smile. Doc thought it was like looking at the sun for the first time. / "—you saved my—" She paused as she, too, really looked at Doc. / She sighed the sweetest sigh Doc had ever heard. "—life," she concluded. / And what wonderful features surrounded that smile! That pert nose, that strong chin, those deep, large brown eyes that a man could get lost in — Doc sighed, then realized that, perhaps, he should say something in return. "

—From Back to the Future Part III by Craig Shaw Gardner (quote, pages 98 and 99)

"Clara was one in a million... One in a billion... One in a googolplex... The woman of my dreams, and I've lost her for all time."

—Doc Brown

Clara Clayton-Brown is the tritagonist of the Back to the Future franchise, serving as the deuteragonist of Back to the Future Part III and the tritagonist of Back to the Future: The Animated Series. She was a schoolteacher, living and working in the schoolhouse outside Hill Valley in 1885. She met Dr. Emmett Brown and Marty McFly by chance when she was about to fall over Shonash Ravine.

Clara was a very independent woman and did not take much fuss from anyone, especially Buford "Mad Dog" Tannen. Clara did not like being lied to and believed that people should tell the truth. She often saved the day after coming up with ideas, she did however try and take actions that helped her or other people avoid dangerous situations in the first place.

Clara was a very intelligent woman. Like Doc, her favorite author was Jules Verne, and she was very interested in astronomy and science. One of her favorite possessions was her telescope, which she often used to look at the Moon and the stars; she also appeared to know where a lot of the constellations were. Clara was a thinker and most of the time thought things through. If she believed something to be too "wacky" or too fantastic to be believed, she would not believe it (such as when Doc tried telling her about the time machine); this, after her marriage to Doc, changed.