Board Thread:Questions and Answers/@comment-5693502-20140503152126/@comment-6166034-20140503180332

Also it is not like the "path/way" they take between floors is a stroll either (that's what is great with all the "Yuri and Wolhaiksong " bits), they may encounter dangerous shinheuhs and "pitfalls" (situations that make even High Rankers/Kurudan uncomfortable).

The Guides are indeed interesting (Hell, it's the field of interest of Gustang the badass !), and seem to be able to climb and take tests at whatever floor they want without needing to pass any  "prior" test (maybe they can even pass tests without being regulars, who knows ?), because they have this "relationship" with the Tower itself ( remember that Headon said to Rachel in her flashback that the Tower can choose like a sentient being).

Now surely one doesn't have to be a ranker to be a guide: Evan entered and passed through the Tower to become a High Ranker, while he was "geneticaly" (white dwarf) a guide.

About "bypassing laws", it seems they have some "privileges", as they can go wherever they want, eventhough they are not "authorized" to go there, and bring people with them (but again it's not THAT simple), are there others ? Is it simply "another" choosing (by the tower itself) ? I don't know.