Tanks are generally responsible for holding the enemies' attention and taking damage for everyone else. They protect their allies and lead the charge straight into danger.

Tank classes are
Paladins
Shield-Maidens
Vanguards

they're usually soldiers recruited directly from specialized branches within norri military. paladins and shield-maidens are knights and valkyries raised by the God of Light to face the darkness, paladins are always maledes and shield-maidens are always females. vanguards on the other hand are masters of the bladed norri weapon called a lance, like samurai they need no defense in the form of shields or armor.