(I've actually seen him do this)

After defeating Mot, navigate the Room of Judgement and face Majin Mithra. Learn about his questions and how your answers might affect your Shin Megami Tensei III: Nocturne HD Remaster ending.

Once Mot is dead, all the walls he created are gone, so if you missed any goodies in his maze, go back and collect them. Then head upstairs.

Right after Mot is the main diet hall. There you will hear a voice welcoming you into its "Room of Judgement." Majin Mithra will then appear. He tells you that he is the judge that oversees the fulfillment of the Miroku Scriptures. Mithra says that he will judge you and tells you that just as the Miroku Scriptures foretold, various Kotowari are appearing, and the Vortex world is moving to the new age of reconstruction. Through one of the Kotowari, the world will be rebuilt, and this is a reason to be glad. But Mithra is not pleased that you, a demon, are planning to create the world. Mithra says that it is not permissable for a demon to take on that role. He goes on to say that as it is his job, he must now ask you some questions.

His first: "Do you acknowledge that you possess the body of a demon?"

If you say yes, Mithra goes on to ask his second question: "Then, do you acknowledge that you possess the mind of a demon?"

If you say yes here, then Mithra asks you if you vow not to try to create the world.

If you say yes once more, then he then looks into your eyes and sees a strange light deep within them--an anger at the world. He says that you are the one that was foretold in the prophecy, that would try to impede the creation of the world. He attacks you to stop you.

If you say no to any of the questions, Mithra gets upset, saying that your lack of acknowledgement proves that you are the same foretold one that would get in the way, and attacks.

To be honest, I don't really know whether or not these questions have any real impact on what ending you're going to get. I have heard some people say that affirming that you are a demon and vowing not to build the world locks you into the Demon ending, but I have heard from others who have done this and DIDN'T get the Demon ending. Just to be safe you are probably best off answering "No" to his questions unless you are shooting for the Demon Ending.