If you pass your tests, you are given the 2nd ranking level- the Pink-jacket. To pass your tests, you must display some kind of proficiency using your clairvoyant skills.
The next level is the Red-jacket. You must successfully fight off the Emim to get a red jacket. Once you are a red-jacket, you are responsible for protecting Sheol I and fighting off the Emim. If you fail this test, you become a Yellow-jacket, which is the lowest ranking.
The Rephaim are the rulers of the white, yellow, pink, and red jackets.