She is not as bright as she looks, but is usually brighter than Dudley. Usually, Nell has to talk some sense into Dudley and sometimes Snidley and sometimes ends up saving the day. Nell also has a bad habit of being captured by Snidely Whiplash and being tied to train tracks. She's always happy to know she will be rescued by none other than her hero....horse.
However, on rare occassions she does show interest in Dudley, and in one episode actually tries to marry him, only to be kidnapped by Whiplash.