Delirium of the Endless

Delirium, (formally known as Delight) is the youngest of The Endless and the younger sister of Dream. Once the personification of joy and happiness, she somehow changed to Delirium long before the onset of the story for reasons unknown (possibly to assert freedom from Destiny). To the ancient Greeks, she was known as Mania. After the events of Brief Lives, Delirium travels with a companion, a dog named Barnabas, on permanent loan from her brother Destruction.