Rodolphus wants to be in the room where it happens (malvado) wrote in thequest,
Rodolphus GOAL: Right now now Rodolphus wants the triad, especially Arlo taken out. He finds he is not suited for leadership and is likely to get them all thrown in Azkaban. I have described him elsewhere as a Paladin. He certainly fits the bill. He is dedicated to the cause and is now looking to make the next king to keep their mission alive.
Knowledge: He knows about horcruxes. He knows Tom Riddle and Voldemort was the same person. He has a copy of the ledger Rabastan and Peter stole from B&B.
He has a working alliance with Lucius and Narcissa to figure out the game afoot, and at the point he is sharing information freely between his family and the Malfoys. Other people might be asked to do things, but he's not saying much else.