Origin
Nelson Wren is a real-estate agent in Gotham City. Wren has trouble when it comes to relationships with women, something Two-Face would later use to his advantage.
Creation
Nelson Wren was created by Matt Wagner for the acclaimed Batman: Faces.
Major Story Arcs
Batman: Faces

Nelson is hired by Gotham Billionaire Paul D’urberville to help sell an island he had recently inherited. The plan was to originally sell the island to Bruce Wayne, but Two-Face sends Manon, his patsy, to secure the trust of Nelson in order to buy the island. Nelson soon falls in love with Manon and agrees to help Two-Face (Although, he is anonymous to Wren) with his plan in exchange for Twelve and a half million dollars. However, Wren later learns that Manon doesn’t truly love him and he begins to regret becoming an accomplice to several crimes. When he tries to confront Manon, she shoots him and takes him to Two-Face. Nelson is provided with the money he was promised but Manon reveals herself to be a bearded lady, much to Wren’s horror. Attempting to escape, Nelson is captured once again and placed in a cell with Paul D’urberville who reveals that he has a two hands on his chest. Batman attempts to rescue both Wren and D’urberville but Nelson is killed by Two-Face when he’s thrown from his zeppelin.