Quote Originally Posted by CaptainLagbeard View Post
Dark Knight in FF has been kind of the opposite of a tank, as their thing has been using up their HP to deal damage... Still somewhat makes me wonder why they chose it as a tank class...
They made Dark Knight a tank, because it was a class that alot of players were asking for. Dark Knight is a fan favourite, just like Samurai, Blue and Red Mage. Yoshida also wanted to introduce the tanking role to non-tankers, because this role is least played among the FFXIV community. So he decided to make a popular class into a tank. The plan was to introduce Samurai as a tank, but since Dark Knight fits Ishgard (and Yoshida wanted Samurai to be a dps) more and they had already added the Ninja, Yoshida decided that it would be best to avoid adding a another class with Japanese roots so soon after Ninja.