Alena, known under the alias Kojo Sledgehammer, is a computer hacker and a huge fan of Felicity Smoak, as she was inspired to become a hacktivist by Felicity since the latter's days in college, eventually becoming a member of the group known as Helix.
Member of Helix
After Alena noticed someone who appeared to be Felicity Smoak hacking the NSA to no results, she contacted her via terminal message, offering her help. The two soon met in real life, Alena excited to meet her idol. She explained Felicity's inspiration to her, before handing her the USB flash drive containing Pandora, hoping to not only exonerate her friend but to inspire her to return to her hacking roots.
Alena soon met with Felicity, who decided that she wished to join Helix.
Joining Felicity and Team Arrow
After freeing Cayden James, Alena noticed that his time in ARGUS had changed him. When Alena disagreed with his plans, Cayden attacked her. Alena would escape, and believed that Cayden was still in Corto Maltese. Alena would later break into Felicity's apartment to ask her for help. They would obtain a ghost mirror drive from Amnesiac, and would later go to the old Helix building in order to discover what Cayden was doing. However, Felicity and Alena were confronted by Black Siren and Cayden James, who was about to execute them if not for Team Arrow. However, Alena was shot during the conflict, and had to be brought to the hospital.
Felicity would later visit Alena in the hospital, and when asked what Alena was going to do now, Alena said she was going to take some time to get some much needed perspective. Alena then asked that after, if she could join Felicity's startup, which Felicity accepted. Alena then gave Felicity her pitch, mass producing Felicity's bio-stimulant implant.
Alena occasionally helps Team Arrow from the bunker with Felicity.
Alena is a very friendly, cheerful individual with a sense of humor. She has great respect for others skilled in computer hacking, namely Cayden James and Felicity Smoak, her personal idol. Alena is strongly loyal to Helix and determined to change the world through its technological operations, even though it often leads into dubious territory. Her carefree personality is not broken even when being pursued by Spartan, as she quickly gets out of the situation, leaving the vigilante behind.
However, Alena is serious and determined when it comes to protecting herself and her friends, as shown when rescuing Cayden. Alena didn't mind killing (albeit accidentally) a corrupt A.R.G.U.S. agent who could lead Helix to Cayden's location, stating that he wasn't even an honest individual to begin with, showing an ends-justify-the-means attitude if the situation calls for it. Once Alena located Cayden, she quickly rushed to him, distraught, and worryingly tried to assure him that he's being rescued.
Alena seemed to have some admiration for Team Arrow. When they tried to interfere in the mission to rescue Cayden, she avoided harming them, as they were Felicity's friends, showing that while Alena isn't afraid to take drastic steps involving Helix, she doesn't believe in unnecessary violence or conflict.
However, after realizing Cayden "snapped" during his imprisonment and vowed to destroy Star City, Alena was horrified and immediately joined Felicity and Team Arrow to stop him.
- Expert computer hacker: Alena is a highly skilled computer hacker, so much that she was able to hack into the computers of the NSA that had evidence to clear John Diggle of the crimes he supposedly committed, and expose J.G. Walker as true culprit, she even managed to hack into the computers of the Arrowcave, despite the fact that its firewalls were designed and programmed by Cisco Ramon, an accomplished scientist and engineer in his own right. Alena's skills seems to rival those of Felicity Smoak.