Board Thread:Questions and Answers/@comment-24.45.130.243-20140428012304/@comment-6166034-20140502062818

The "role" or duty of the guardians is to test the irregulars, so they could climb and go up. The final goal seeming to be to go to the "top of the tower". So obviously the guardians may seem cruel to the irregulars, curious, toying with them, but it is because they have been created to test them and in order for the "worthy ones" to reach the top.

So I guess gardians may have an "ethical" problem with Enryu ( since he killed one of them), but maybe they aren't that "social" between themselves.

I think Zahard is somewhat "favored" to them (since most of them have contracts with him), but this "hibernating" /not climbing situation might frustate them because it goes against their duty.

Why did Headon help Rachel ? Well because he found out that a "worthy" Irregular would risk his life to chase after her, but would stop climbing if she (who is worthless/powerless) can't climb. (well obviously that's my theory :p nothing official.)