Nightstar456

Background
Nightstar456's origin has very little known about it, besides that teenager, Samuel Carson, decided to follow in the steps of Batman one month before the first exobites started showing up. Samuel Carson was then captured by Brainiac and locked up for almost exactly a year, before finally breaking out. He was helped by Oracle to break out and now he helps Batman in his multiple exploits.

Scarecrow
When Nightstar456 broke out, he was given a mission directly afterwards, with Scarecrow, having recently broken out. Nightstar456 had taken out multiple henchmen and found Scarecrow's base in the sewers. There, he met Batwoman, who had succumbed to the nerve gas. Nightstar456 managed to break Batwoman out and helped take down Scarecrow and arrested him.

Bane
Nightstar456, sooner rather than later, discovered from Batwoman that Bane was on the loose. Knowing this, Nightstar456 went out searching for Bane's drugs. After finding samples of the drugs, Oracle gave him a relative area to search for the Drug Distributor. Inside, Nightstar456 met up with Nightwing and they both helped eachother take down the Distributor. After gathering more clues, Nightstar456 and Nightwing both went and dealt with Bane and his gang.