Hush
Thomas "Tommy" Elliot was a childhood friend of Bruce Wayne who, out of jealousy, decided to take him down, using the moniker Hush. Hush first appeared in Batman #609 (January 2003) as part of the 12-issue storyline "Batman: Hush". He was created by Jeph Loeb and Jim Lee. A former friend of Batman, the character serves as a criminal foil personality to him.