Her Blood Demon Art is called "Garden of Eternal Bloom". Basically, anyone she kills doesn’t stay dead. Once she spills their blood, these crimson flowers sprout from the corpse, and the body comes back to life under her control. They’re not truly alive, more like puppets tied to her will (Also when her BDA ends the people vanish.) The creepy part is, the stronger the person was in life, the more dangerous they are when she brings them back. A regular human just shambles around, but a fallen Demon Slayer can still fight using fragments of their skill. It’s like she builds this grotesque garden of blood flowers and corpses around her on the battlefield. She can control multiple at once, but it drains her, and if the blood flowers are destroyed the puppet collapses. She even has this terrifying ultimate move where she can resurrect an entire field of corpses all at once into a coordinated army. It’s horrifying because not only do you have to fight her, you might be forced to fight your own allies who just died seconds before.