As the name suggests, the Knights who say Ni are knights who say Ni and live in the forest. They are led by a larger knight, who is rather taller than anyone else. Otherwise, they are of normal height. They also have a strange fascination for shrubberies, as they demand them for passage. They enjoy giving impossible assignments, such as "cutting down the largest tree with a herring!"
However, they also have an unorthodox paranoia for the word "it". They also become devoted to the words ecki ecki ecki ptang zoowop