"When you call a summon they won’t always do the same thing. They are entities that exist in the world itself. So depending on the situation they will do different things. For example, Titan sometimes will run up and hit an enemy, sometimes he will throw boulders at the enemy and it’s possible he will even give up and leave the battle. They will also act differently in a dungeon than they will in the overworld."
Claustrophobic big ass summons confirmed!
Lube Me Up