SCP-049 is a very refined, formal, and patient man, despite his state of mind. He appears to wear a plague mask and plague doctor robes, but these robes are his skin, and the mask is... well. His face. It's made up of his skeleton and keratin. Gross, but also fascinating if you're into that kind of thing. He's immortal, coming from the mid-19th century in France. He's been in the custody of the SCP foundation for centuries, and as a result, may have lost a few screws up in his noggin.