Rodnim is a commoner who wanders around the entrance to the Ducal Palace in Baldur's Gate North to inform passersby that they will not be let inside. However, in Chapter 7 instead he will speak of how he thinks Sarevok is the right man to be a Grand Duke and as he is the only one that can make a stand against Amn. If you then speak to him again after exposing Sarevok at the Ducal Palace he will say that he is relieved that Sarevok has been found out and that his 'common folk' would have been in trouble otherwise.