Alois has anger management problems and a short attention span. For most of the anime, he is blabbering his mouth off to Claude about killing Ciel and Sebastian. (Damn him!)
Alois is also a rarely used term used by Kuroshitsuji (Black Butler) fans to describe someone similar to the fictional character. His past is very intense and dramatic. Not only does he get extremely happy when his village is burned down, his little brother also dies and he ends up sleeping with a sixty year old man, Lord Trancy. Fun.
Johnny: Don't you think I look hot in these? -nudge nudge-
Patrick: Such an Alois.