According to creator PKM himself, Alfred the kind of guy who devotes his time to his job more than his family. He rarely shows his soft side. He's serious most of the time and often can't control his own anger. I interpret him as menacing, intimidating, and most times, threatening to the point where it could be scary. PKM imagines he would have heavy and serious tones. I imagine him to be growly, deep, and powerful. Hopefully in his portrayal, I expect to feel the intimidation and expression.