Lui is aggressive and intense. He also may be a sadist as he is seen to inflict harm onto Shu Kurenai multiple times by creating the scar on his face, broke Spryzen, and damaging his recovering shoulder. This resulted in Shu having a deep hatred for him. Like the other members of the Supreme Four, Lui has been shown to possess some intelligence, as demonstrated when he battled Red Eye and destroyed his mask, stating afterwards that he knew it was Shu the whole time.