The blood of several stained the walls, but the bodies had been dumped into shallow, unmarked graves. She did not care much for them. She just didn't want them stinking up the place. Anyone who found the bodies would note that the flesh seemed to have been peeled off from some and that the bones had been broken with surgical precision as if to try and cause a certain effect. Unless you knew Naraku you would not know what this effect was. It was simple. Pain. She liked to cause pain to as many people as possible.
Now you are probably wondering how a 12 year old girl could kill people so easily and with such cruelty and why she'd stay in a place she was scared of. The reason was simple. Her name was Naraku Makura. It translated to Hell Total Darkness. Not a normal name for a child, but she was no ordinary child. She was the adoptive daughter of Kurayami, a hell demon. Under her care she had become a hell demon slayer and that was the mistake. In one of her efforts to cure her Achluophobia, which wasn't suited to a hell demon slayer who fed on darkness, Kurayami had locked her daughter in a dark room where nothing bad would happen. With luck it would cure the girl's phobia. However, luck was not on their side and as soon as the door was locked it was blasted open and out came a young 12 year old girl bathed in an aura of darkness. She was in full demon force mode and in a total rampage. Kurayami had tried to calm her, but to no avail. With each strike she just seemed to get more and more berserk. Soon Kurayami succumbed to the assault and fell dead. Much destruction was caused and several other hell demons fell to her onslaught before she calmed. When she calmed the head hell demon banished her from hell to walk the mortal realm.
Which was how she came to be here. She had wandered and she had found a home that suited her to some extent. People get coming, yet none tried to bother her. Just to solve the mysteries of the castle. It was a shame she was one of those mysteries. Few who entered left alive.