Bellona is a take-no-prisoners fighter who wields several different giant weapons (including sword and hammer) depending on the attack. The more Bellona hits or gets hit, the faster she moves and the more protected she becomes, making her an agile tank.
The recent patch also added new champion skins, emotes, voice packs, and a new god rotation. You can watch the patch overview video after the jump.
[Source: Patch notes. Thanks, Sorenthaz.]