Rene was the father of Margaret of Anjou Queen of Henry VI. Rene played his part in the negotiations with the English at Tours in 1444 and the marriage of Margaret to Henry - the fall out of which (the loss of French territories of Maine and Anjou, that had formed part of the marriage contract) as you will know, was far-reaching.
A wonderful description of Rene is given by Conn Iggulden in his book Stormbird, the first of his Wars of the Roses series (read it if you haven't already, its a must) The description comes from the mouth of the teenage Margaret.
"He was just a great white slug of a man. His face was unnaturally pale, perhaps from his years languishing in prison. His eyes were grey and cold, half hidden by heavy, unwrinkied lower lids, so that he always seemed to be peering over them. He had clearly not starved in prison."