User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Gwaine's sister/@comment-4135736-20120426120716

I personally think that Gwaine's sister would appear in a filler episode because by the way Gwaine was talking about her, she didn't seem that much of an important character but I I do agree that she would be a villain as Gwaine called her an "evil eyed toad" as you said above.