Kaigara Kaigara no Mi

Freya Odile of the Black Swan division of marines ate an unidentified paramecia devil fruit that caused her entire body to become a segmented exoskeleton. Her conscious mind effectively manifests as a cloud of intangible smoke inside the shell. Notably, the shell is not considered part of her, and so she is not harmed by attacks to it, wether they are infused with haki, or even backed up by the Zetai Zetai no mi, as one marine training excercise revealed. However, her smoky body can still be damaged as though it were a logia's elemental form, and so becomes her weakness.