Almost nothing is known about the strange doctor named Kazutaka Muraki.

He never seems to be a normal human being. His skin and hair is far too white to be natural. And he is much stronger than a man of his age and build should be.

Muraki is a mad scientist. His favourite experiments are to create artificial humans.
He makes his experiments with humans. Normally, he sends out Tzuzuki to bring him "fresh meat" like he calls it.

He is in love with Watari.