Hayou no Ken: Shikkoku no Mashou

Laethreel, a young demon hunter, is assigned to rescue the princess of Gandia from the clutches of a wicked noble demon named Aju. On her journey she is accompanied by her unpredictable and bloodthirsty sword Grenki, and a sweet-talking demon Anshu, who claims to be her ally. Little does Laethreel know that on her mission, she won't face only beasts but also the dark conflict of her origin.