Tale of the God-Slayer
The connection between Athena and the mysterious figure is revealed along with the figure's identity. Godou rushes off with Athena while the others stay behind to try to buy enough time for the Authorities Godou used up battling Ama no Murakumo to recharge. Fortunately, thanks to Godou, Erica has an ace that'll let her fight almost at the level of a Campione. If Godou can't defeat his new opponent, then Princess Alice's prediction of the world enveloped by the Starless Night (which was mistakenly attributed to Athena) will come to pass. He'll need the help of all five girls to achieve victory.
Aired 28/09/2012EP 13 - Tale of the God-Slayer

Campione!
Some people suddenly find religion, but for 16-year-old Kusanagi GoDo, it's that REALLY old time religion that's found him! As the result of defeating the God of War in mortal combat, GoDo's stuck with the unwanted position of Campione!, or God Slayer, whose duty is to fight Herectical Gods whenever they try to muscle in on the local turf. Not only is this likely to make GoDo roadkill on the Highway to Heaven, it's also a job that comes with a lot of other problems. Like how to deal with the fact that his "enhanced status" is attracting a bevy of overly-worshippy female followers. After all, they're just there to aid him in his demi-godly duties, right? So why is it that their leader, the demonically manipulative sword-mistress Erica Brandelli, seems to have such a devilish interest in encouraging some VERY unorthodox activities?
(Source: Sentai Filmworks)