Origin
Born and raised in England, little else is known about Holly McKenzie. It is unclear how she got or discovered her powers. Following a sleepwalking event in which she caused the deaths of at least two police officers, she was invited by Mr Nobody to join the newly-formed Brotherhood of Dada.
Creation
Sleepwalk was created by Grant Morrison and Richard Case. She made her first appearance in Doom Patrol #23.
Major Story Arcs
The Painting That Ate Paris
Sleepwalk is sent along with the Fog to Japan to pick up the Quiz. Later, she helps the team steal the Painting That Ate Paris, and is absorbed into the painting along with the team, and the entirety of Paris. Inside the painting, she fights and defeats Cliff Steele. Immediately afterwards, she becomes psychically aware of the presence of the Fifth Horseman of the Apocalypse, and warns her team of its imminent arrival. She joins forces with the Brotherhood and the Doom Patrol to defeat the Horseman. She elects to remain in the painting, along with the other members of the Brotherhood.
Powers and Abilities
Sleepwalk has incredible power, but only while she is sleepwalking. To this end, she frequently consumes sleeping pills, and wears headphones so she can listen to Barry Manilow music. Her displayed powers include superhuman strength and stamina, and prophetic dreams.