Aya is a member of the Green Lantern Corps.
On the Moon, a group of Green Lanterns, including Aya, explain to Superman and John Stewart that there is no treaty between the Guardians and the Manhunters, and then she suggests that these Manhunters were rogue units that have gone mad without a purpose. Superman asks who created the yellow rings that powered the robots and the Lanterns explain that in order to battle the Manhunters, the Guardians took extreme measures. After this revelation Aya and the other Lanterns decide to return to their sectors and report to their post.
In space, a small group of Green Lanterns observe the battle on Earth. Aya says that they had agreed to not interfere but Salaak confesses that he feels responsible for what happened, even though he had good intentions. The Green Lanterns are not sure if they can fight Parallax because the last time they did it, most the members of the Corps were killed and Oa was almost destroyed. Salaak then plays John's message about the one thing that frightens Parallax, so they decide to find it and stop the fear entity once and for all.
When Parallax is about to attack Superman and the depowered John Stewart, the real help comes when the Green Lanterns arrive on the scene with the entity of willpower. Unfortunately with the yellow power rings getting reset the same happens with the green ones, leaving the Green Lanterns temporarily depowered as well. The two entities begin to battle and with an assist from Superman, they banish Parallax to its realm, which was his greatest fear.
In the aftermath, the Green Lanterns reevaluate their mission parameters and as their rings finish their reboot, they decide to choose their own destiny.
During the battle with the Monitors, all the heroes are fighting valiantly. The powerhouses are stuck with their specific missions and none would be able to succeed and return to help Green Arrow and Speedy in time. Fortunately, out of nowhere, the cavalry arrives as Green Lanterns John Stewart and Aya shield the archer while Blue Lantern Saint Walker uses his ring to blast away their attackers. John reveals that all other space sectors are now erased and rebooting but with no time to relax they all race to help Wonder Woman.
Aya, John Stewart, Saint Walker, Supergirl and Superman continue to battle the Manhunters.
Aya asks John Stewart if this battle echoes the Parallax Wars as they battle powerful Monitor soldiers. John tells Aya this is far, far worse but the distraction is enough that Saint Walker is captured and killed, despite a delayed bombardment of emerald energy on the Monitor army. The two Green Lanterns are heartbroken as the blue ring leaves orbit for a new owner.
Superman spots a pod approaching Earth. The pod overcomes the heroes and speeds beyond them breaking the sound barrier, aiming itself at Watchtower. As it crushes, John and Aya protect everyone with an emerald bubble shield.
Later, John and Aya try to hold back the Omega Monitor and Aya calls John by his real name making him realize that they are at world's end.
Aya and Nightwing tries to fight off the Manhunters. Suddenly a flash of blue energy envelops her and she is given Saint Walker's Blue Lantern ring which she uses to create blue hope constructs that destroys all nearby Manhunters.
In the Comics
Aya made her debut in Green Lantern #64, during the War of the Green Lanterns storyline.
Aya is an Artificial Intelligence created by the Green Lanterns Stel and Hal Jordan, when they rebuilt and reprogrammed a ship found in a junkyard on Oa that was used by the Manhunters, called the Interceptor. The ship was kept by Jordan in a hangar in Sector 2000 on a planet known as "The Green House." Aya served as an interface for Hal's ship but she was presumably destroyed along with the Interceptor by Kilowog.
- Aya was specifically created for the Green Lantern: The Animated Series, but during the production of the show she was added into the Green Lantern comics.