Morpheus was an endless, a being that existed since the beginning of everything, when something existed that could dream, he was there, governing their dreams.
This being said, he was stubborn, tactless. He didn’t take criticism well, in any form. When someone questioned him, or put him on the spot, or spoke out of turn, he was always swift to put an end to it. Asserting himself as the commanding authority.
He had a short fuse. This often led to later regrets, which he never acknowledged. His coping method of choice was to simply move on from it, refusing to acknowledge whatever event had caused contention in the first place. He didn’t apologize. He was the lord of dreams. An endless.
He tried to be conscientious sometimes however...
“Enough.” He said firmly, waving his hand in a dismissive manner. When his short command fell on deaf ears, his anger mounted.
“I said enough! I am the king of dreams. You’re in no place to question the choices I make about The Dreaming or what happens in it. You will do as I say.” He finally snapped, a silence overtaking the atmosphere.