Roth is a journalist. He writes for the Endwardener Tageblatt, the local newspaper. Roth interviews Obuch about how he found the dead girl.
Roth does not play a very important role in the book. Although, he does in fact have a distant family member working for the Bricks family named Heidler. Without this connection, Obuch would not have discovered some information about why Tamara was in Endwarden.
The comic relief part of the story involves Roth. Roth is described as a gray man, gray clothes, gray face, etc. In German the name "Roth" is pronounced as the German word "rot" which means red. This gray man is actually called "red."