Actually, "cute" suited Duncan a lot of the time. Not all of the time, but often enough. Perhaps because he wasn't very good at being a demon. In fact, his decidedly less-than-Trudi's lack of desire to stir the proverbial evil pot made him a bit of an outcast. His demon brethren often accused him of 'playing human,' and truthfully he sometimes felt he did. He hung around mortals and somewhat-mortal creatures; rarely did he interact with the darker, more evil counterparts of his own race.
His eyes flicked very quickly from the small hand on his arm to her eyes. He opened his mouth to tell her to be careful, but what forward was: "Have fun, darling."