At first, Simon is seen as an uncaring, cold father towards Lukas. Simon is also a bit abusive and an alcoholic, however, after Lukas defeats his father in a "fight" (Lukas only winning because Simon was drunk), it's shown Simon is proud of his son and sorry he never got to be a good father to Lukas.
"Vamps and wolves weren't meant to live side by side. It's unnatural. Buckley may think he can hold it together, but the day is coming. And you don't want to be here when it does." (To Nick, Dog Eat Dog)