Read more about Shriek (Marvel) at: Wikipedia

Official Site: Marvel Comics

Shriek is a fictional character, a supervillain in the Marvel Comics universe. She is an enemy of Spider-Man. She was created by Tom DeFalco, Mike W. Barr, Terry Kavanagh, Ron Lim, Jerry Bingham, and Mark Bagley and first appeared in Spider-Man Unlimited volume 1 #1 (May 1993).

Shriek is a dangerous and criminally insane villainess with the ability to manipulate sound. During the events of Maximum Carnage, she allied herself with Carnage and several other supervillains who went about New York on a killing spree.

Shriek's origin and real name are uncertain. She was named Sandra Deel in her earliest appearances, but named Frances Louise Barrison in later appearances. According to the Spider-Man Encyclopedia she was born Frances Louise Barrison, but used Sandra Deel as an alias.

During her childhood, she was abused by her mother for being overweight, driving her to drugs and leading to her later fixation on becoming a mother herself. She became a drug dealer, which exposed her to situations that ultimately damaged her sanity; namely, being shot in the head by a police officer, and being put in Cloak's dark dimension. The origin of Shriek's powers is unknown.

Shriek (Marvel) has not been a contender in any CBUB matches.