Luciana Estevez

Luciana Estevez is a doctor and former human that appears in the second season of Blood Blockade Battlefront. Her humanity was willingly taken by Magra de Grana so that she could save everyone in the hospital.

She is able to divide herself into numerous units causing her to de-age and look like a child.

Phantom Surgery / Phardem Triga (幻界執刀「ファーデムトリガ」) is her fighting style. Luciana and her clones slices her victims with her scalpel, thus, causing the latter to split into pieces. The clones then become one Luciana who has longer hair and a more mature physique.

(Source: Kekkai Sensen Wikia)