|Relatives|| Streak (father)|
|Book Universe||The Saga of Darren Shan|
|First Book Appearance||"Vampire Mountain"|
Rudi is a male wolf cub. His father was dubbed Streak by Darren though his mother remained unnamed. He, along with Streak, his mother and another she-wolf, traveled with Darren, Mr. Crepsley and Gavner Purl to Vampire Mountain. He got stuck up a tree and was attacked by a rabid bear until Darren, the wolves and the Little People saved him. He saved Darren's life by attacking the bear when Darren was about to be killed. This gave Darren enough time to run, making the bear give up.
Later, after Darren had gone down the river of Vampire Mountain, he met Rudi and the other wolves again to find that he had grown.