Hunter X Hunter X OC

Zero was 5 when her parents sold her to a mad scientist because they needed money and they wanted to get rid of her. While Zero was with the scientist she was tortured beyond belief, but once they were done, she had heightened senses, she couldn't feel pain, she could run faster and she was stronger than ever. But the only problem was once she got angry she basically became a terrifying killing machine and only could be calmed by drinking someone's blood. Zero ended up escaping once she turned 10 once she heard that the scientist was letting other "patients" free and keeping Zero with him, she got pissed and killed everyone in the building

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