Barbara Gordon Become Batman’s Information Supplier, Oracle
In a 1989, then DC Comics editor Kim Yale and writer John Ostrander reimagined Barbara Gordon’s arc by taking inspiration from the otherwise horrific events Alan Moore put her through the previous year. Suicide Squad #23 marked her first appearance as Oracle, who uses her impeccable skills behind a computer and photographic memory to remotely provide many superheroes with whatever information they would need in their pursuits, including Batman, most notably.
The Dark Knight’s relationship with Barbara Gordon as his main data supplier has been a focal point of various other media, such as in the Batman: Arkham Asylum video game and its sequels. Among Oracle’s many costumed allies, Batman is also one the few to know her true identity, along with the team of superheroines she would eventually bring together.