Although this line of thinking was already clarified by Kakai in an interview when she admitted that they were only best of friends and she regarded Mario only as his older brother, many still do not believe her.
However, if the relationship is indeed "love", more people will not believe it either. It is because of the physical atrtibutes of Kakai which is far below the beauty of Mario's previous girlfriends. We have to admit that it is not only outside beauty that attracts a man to a woman. The inner beauty plays an important role in a lasting relationship. At the moment, let the relationship of Kakai and Mario blooms into something special in the future. Let their friendship thrives.