Board Thread:General Discussion/@comment-24.0.250.54-20131218174120/@comment-27.253.111.110-20131223031330

I think it's mentioned somewhere that they control shinsoo in order to stop aging. In that way, the do not need to climb the tower to stop aging, but simply need to know how to use shinsoo that way. That's why the Zahard's princess with Opera can do it despite not climbing the tower.

Shinsoo control isn't inversely proportional to aging, most likely. You can either do it, or you can't. Their appearance is likely based on their age when they achieved that level of skill.

Also, Zahard and the 9 Great Families weren't granted immortality by the Guardians. As I recall it, Zahard has a special deal with the Guardians that he cannot be killed by inhabitants of the tower. The rest of the leaders, and only the leaders, of the 9 Great Families except Hendo were granted immortality by the 100th Floor Guardian. The rest of the members probably stop aging using shinsoo the same way the rest of the rankers/regulars do.

To be noted is that it is highly unlikely that the 100th Floor Guardian grants this gift to all who pass his test, and that's why rankers don't age. This is because we've seen some very young looking rankers, and the fastest person to climb the tower is Urek Mazino at 50 years.