Characters of Angels & Demons

Robert Langdon is the main character in the book Angels & Demons. In the book he is called by a scientist in Switzerland who has discovered a dead body with the fearful word "Illuminati" banded onto his chest. This word is interesting for it can be read upside down and right side up.
The scientist is named Miximilian Kohler. In the text, the two do not have an even relationship. The men often tell each other that they are wrong and disagree on some issues. Kolher would be described as a rude man. Intellectual but not a very friendly man. Being some what of a grouch, Dr. Kohler stays to himself in the lab. I believe he has some secrets in his mind that Robert does not know about.

Robert is a simple man who is very educated in history. He is a very level headed man with a good sense of serenity through out the book and the last book, The Da Vinci Code. One thing I have noticed from this book to the last was that in the Da Vinci Code, Robert is very naive and unaware of danger, and he gets himself into trouble easily as the book went on. In the new book, Angels & Demons, Langdon is notibally not as out going. He takes careful precausions and makes sure that all the details were safe.

The conversations between Langdon and Kohler are very tense. The two have not a very easy going relationship. According to the text,
"THIS COLUMN IS IONIC...Langdon mused, eyeing the column and chucling to himslef. 'I'm relieved to see that even billiant physicist make mistakes'
Kohler looked over. 'What do you mean?'
'Whoever wrote that note made a mistaske. That column isn't Ionic. Ionic columns are uniformed in width. That one's tapered. It's Doric-the Greek counterpart. A common mistake.'
Kohler did not smile. 'The author meant it as a joke, Mr. Langdon. Ionic means containing ions-electrically charged particles. Most objects contain them.'
Langdon looked back at the column and groaned" (Brown, 23).

Based on this conversation between the two men, you can sense a bit of uneasiness and a bit of rivalry between them. They are very tense and this strange interaction between them may get better though out the book, or actually cause a great conflict.

Do you think that Kohler is apart of the murder at all? Could Kohler contribute to the problems in the story that are soon to come?