Morpheus
The Lord of Dreams.
Where is he from?
Morpheus is the main protagonist of the Sandman, a seminal comic book series published by DC's Vertigo imprint from 1989 to 1996, which is arguably the single greatest comic book series ever written. There have been continual attempts to create adaptations of the series, but none have ever come to fruition. Series creator and utter genius Neil Gaiman fameously said "I'd rather see no Sandman movie made than a bad Sandman movie."
Comic Appearances
GND 187 - Sarah, Christine & Luna see off Susan Sto Helit. She talks to her grandfather Death (and his horse Binky), who talks to Death of the Endless, who talks to her brother Morpheus, who then takes the Pale Man to the Nightmare Realms, where he can befriend the Corinthian & Matthew.