Vinir is a drow born in Menzoberranzan. He was sold as a child to a devil of Avernus. For 200 years he was forced into the devils service and be trained as a strong fighter. One day his infernal master was slain and he was free. 

Over the years he lived on in the hells becoming the gaurdian of the damed and slayer of demons and devils alike. The Devils of the hells call him The Infernal Knight and it kind of just sticker with him. He is the most talented and strongest fighter in all the realms.