Fiona and Luna had never seen eye to eye before! Fiona would have ended the quarrel a long time ago by using her ability, but Fiona couldn't do that because Luna was so fucking strong that Fiona's powers just bounces off her like it is nothing!. In fact, Fiona has to be careful when she is around Luna to make sure that they don't get into a physical fight. Fiona knew that she couldn't win that in a million years, so she always made sure that their conflicts were only verbal or psychological in nature.
And right now, Fiona felt like she was on top of the world. Fiona heard some of the things that Luna and Mark just spoke about and she knew that Luna was trying to recruit Mark into her guild. The mere fact that Fiona got Mark before Luna could just made everything right in Fiona's world! Fiona didn't even care to know why Luna wanted Mark so badly, she just knew that she won!