>>42370178she feeds off of the souls of drawcia, marx and a few other corrupted beings after kirby kills her, but she can't control them and loses her sense of self. the "Soul" creatures appear to be fueled solely by their desire, which for sectonia is beauty.
the amazing mirror connects back to triple deluxe and planet robobot but i don't think sectonia ever used the mirror or met any of the shadow people. i'll post mirror world lore next.