Alena Whitlock

"Kojo Sledgehammer" is the alias of a computer hacker and a huge fan of Felicity Smoak, as she was inspired to become hacktivist by Felicity since the latter's days in college.

Abilities

 * Expert computer hacker: Kojo is is a highly skilled computer hacker, she was hack into the computers of of the NSA that that had evidence to clear John Diggle the crimes 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 it's firewalls were designed and programmed by Cisco Ramon, an accomplished scientist and engineer in his own right. Kojo skills seems to rival, if not surpassed that of Felicity Smoak's.