Not much is known about Darcy, except that she's Lisa's new friend, and that she has a cat.
Personality
Darcy is essentially the opposite of Lisa. She is sweet, kind, fun-loving, energetic, and always acts her age. She also has a strong sense of humor, finding Lisa's use of large words (such as "formaldehyde") amusing. Though initially unaware that Lisa was taking advantage of her, she genuinely comes to see her as a friend and was heartbroken when Lisa abruptly ended their friendship.
However, she is shown to be generous, forgiving, and compassionate, as she gave Lisa a cookie when she noticed Lisa was feeling down even though the latter had upset her, which led to them being friends again. She is also sympathetic to Lisa so she can get her grade A back on social skills on Lisa's report card again.
Darcy is a little dark-skinned girl, with short, dark brown hair, and three pairs of eyelashes. She wears a sleeveless cyan shirt with a pink flower on it, yellowish shorts, pink socks, and white LED light-up shoes. She also has a pink band-aid on her right leg, which shows that she has a small wound.