Bon's personality is rarely shown but he seems to be a violent psychopath, brutally mutilating people for no reason other than to make them "beautiful". However in Company Introductory Tape, he is seen cowering in fear, showing he has some feelings for Sophie Walten and immense guilt. However, this empathy seemingly doesn't extend to others, as Bon seems proud of what he did in Lucky You.
*stands menacingly in the corner…* “HÆHÆHÆHÆHÆ…”