Opposites Attract (Black Butler Fanfic)

An 20 year old maiden named, Catherine. She grew up in the forests with 2 huge guardians of hers, they want to protect the maiden like her forest friends. They will take care and protect the maiden even if they risk their lives for her. Her soul was as pure as snow, even if she killed people to protect herself and of course her guardians know that there are demons lurking somewhere and they will never allow those demons to take the pure soul of their mistress.

What happens when they meet the young Earl and his demon butler, wandering around in the forests to look for the maiden with the forest creatures to steal food for her?