Morpheus

Morpheus (Μορφέας in Ancient Greek ) is the god of dreams, the son of Hypnos and Pasithea and the leader of The Oneiroi. He is also known as "The Shaper," for being able to change form in peoples dream's with the help of his two brothers. His Roman counterpart is Somnia. His symbols are a closed eye and a dark crown. Mortals call him "the Sandman."

The Battle of the Labyrinth
Morpheus is mentioned as one of the minor gods who've gone over to Kronos' side.

The Last Olympian
When Percy and Nico wake Grover up to get his help to enter the Underworld, Grover tells them what had happened. During June in the woods in Harlem Meer, Grover saw Morpheus. Morpheus, in his words, was scouting the battlefield before the battle, and put Grover to sleep for two months. Later in the book, Morpheus casts a huge sleeping spell (presumably with the help of Hecate) which causes all of the mortals in Manhattan or near the area to fall asleep. This event is described in the line of the Great Prophecy: "And see the world in endless sleep."

Appearance
Morpheus is described as a tall man in a long black coat. He does not cast a shadow (even at midday) and shimmered as he moved like a mirage. His face cannot be made out, as it shimmers and changes when looked upon because he is the God of Dreams.

Abilities

 * Morpheus is the god of dreams, so he can make people fall asleep.
 * When looking at his face, it makes the viewer sleepy.
 * Whenever he passes humans, the human would pass out, curl up and fall asleep, and after he had gone, they would wake up and act as if nothing had happened.
 * He can send images to humans in dreams.
 * He can shape people's dreams.
 * Was able to put New York to sleep, but he could not do this to the heroes.
 * Morpheus has the ability take any human form and appear in dreams.

Trivia

 * It is not certain if he has any demigod children, however, in The Last Olympian, Percy asked for a cabin to be built for him, like the other minor gods, although it was never mentioned afterwards.
 * Like the other minor gods that had sided with Kronos, he was probably forgiven after the war.
 * Grover (who has the ability to feel when something was wrong in nature) was able to sense him as he made the ground tremble, like something powerful was near.
 * Since the spell he put on Manhattan was unable to affect the demigods fighting against Kronos, it can be presumed that there are no other demigods living in Manhattan. (Unless the spell affected unclaimed demigods or the people who were awake stayed inside.)
 * The drug 'Morphine' is named after him.
 * While Morpheus is the god of dreams, his powers seem to overlap with Hypnos, god of sleep.
 * It is believed that in the Iliad he is spoken as "Oneiros".