She is a reference to "Xena: Warrior Princess", a TV series, and its main character. Additionally, Wōden (Odin) is a Norse god, while Xena once was a favorite of Greek war god Ares. For a time she served Odin as a valkyrie. 
Patch changes Edit
- Patch 4.0.3a (2010-11-23): Added to Twilight Highlands.