Luciana Estevez is a doctor who shows up in Blood Blockade Battlefront's second season. She gave up her humanity to Magra de Grana in order to save everyone in her hospital—a pretty significant sacrifice.
What makes her unusual is that she can split herself into multiple copies, which causes her to de-age and look like a kid. Her fighting style, called Phantom Surgery (Phardem Triga), is basically her and her clones attacking with surgical scalpels that slice victims apart. Once the clones recombine into a single Luciana, she comes back looking older and more mature, with longer hair.
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