Who was the riddlers girlfriend?

The Riddler, a character from DC Comics, is often associated with a character named Harley Quinn in various adaptations. However, his most notable romantic interest in the comics is a character named "Joker's Girlfriend," who is sometimes referred to as "Eddie's Girl" in certain storylines. In some iterations, the Riddler has also shown interest in characters like Catwoman or Poison Ivy, but these relationships vary widely across different comic books and adaptations.