Ju Fa was very short tempered and had aggressive tendencies towards anything that irritated him in the slightest, which even applied to his fellow Lord Tensen members as he destroyed Zhu Jin's head for allowing a human to get the better of them. While it's true that all members of Lord Tensen have a complete disregard for human life, Ju Fa was the one Tensen who truly despised the race with a passion, believing them to be nothing more than "livestock" in creating more Tan. 