Its armor minimizes the damage it takes and is almost impossible to stun as long as you don't yank off its helmet with the chain.
It attacks by charging with it's lance into the enemy which, if dodged, can give you an opening to strike.
There are three places the chain can latch onto : The lance (only when dead), the hand and the helmet (or head when the helmet is off.)
if you bind his arm, the Ogre knight will make you trip by tugging on the chain, making you open for attacks.
Chaining his bare head is the only way to obtain pulsating flesh from this ennemy, the hand will give normal