Freed Justine can copy a lot of forms and use magic to make the abilities his. He can write in the air and his Kanji have great versatility in combat. None of those will be able to do a whole lot to Medaka though. Not only are her physical abilities already at an exceptionally high level but she can copy any ability that she has only seen once as well. So given that her abilities are greater than his in every way and she was already stronger than him, there is no way for Freed to make a comeback here. Medaka Kurokami wins.