Reinhardt L. Rauschenberg is a vampire dragon who had just woken up from his deep slumber. He has the appearance of a human, only because he disguise himself as so. Due to his current circumstances, he could only maintain the human form for several hours for a week.
He wanted to assimilate himself into the human world, a world which is vastly different than his original world. He wants to learn about the human cultures and their lifestyle so that he wouldn't appear suspicious.