Who is Thanatos, you ask?
Well, if you've read the very first Chapter, as stated in Hara Shinichi's profile, his codename is Thanatos. So, yes, Thanatos is Hara Shinichi, our dear sniper and spy from Indeco or the International Defense Confederation.
Now, for Chapter 3, I would definitely say that research had a lot to do with how this Chapter was written. My classes on Asia's Political History had paid off because I actually knew bits and pieces about Japan's role in World War II.
As mentioned in Chapter 3, Japan has Article 9 which states that Japan renounces war and it forbids maintenance of any war potential in land, sea or even in air. Meaning, Japan does not boast of a strong defense system. It does not have an Army, even Naval or Air forces. It only has the Japanese Self Defense Forces which is made of individuals, more like their police.
Here is the original context of Article 9 in Japanese script:
二 前項の目的を達するため、陸海空軍その他の戦力は、これを保持しない。国の交戦権は、これを認めない。"Here's the Official English Translation:
"ARTICLE 9. Aspiring sincerely to an international peace based on justice and order, the Japanese people forever renounce war as a sovereign right of the nation and the threat or use of force as means of settling international disputes. (2) In order to accomplish the aim of the preceding paragraph, land, sea, and air forces, as well as other war potential, will never be maintained. The right of belligerency of the state will not be recognized."
If you wish to know about Japan's Article 9, I suggest, you read up an article on Wikipedia explaining Article 9 in depth, including it's Historical background and interpretation. I bet this would be very nice trivial piece of information for everyone.
The Article is found here.
Moving on, Chapter 3 has also mentioned another character who is popularly known as "Azrael" or "Angel of Death", a famous assassin-for-hire in Asia who is also beginning to inflitrate the US as well as Europe.
I do not wish to give out much info as of the moment since it might spoil the plot. However, there's but one thing I can assure you of: Azrael will show more of himself on the succeeding Chapters. And it's your (the readers) mission to guess who Azrael is.
This is not just story. It's a chase. And as readers, you are part of it.
Hope you guys enjoy the surprises I have.