Fiore was Darians childhood friend when he came
            to visit earth as a young boy.Later on he came back
            to earth to find Darien.He had a Kisenian flower
            with him that he found on an alien planet.The flower
            made him evil.He wanted to kill anyone who made Darien 
            unhappy.Fiore was insanely jelouse of Sailor Moon,
            he wanted to be the only person with Darien.He became
            so possesed by the Kisenian flower that he tried to
            make a meteor hit the earth so noone else would be
            alive to be with Darien(is that obsession or what!).
            Sailor Moon stopped the meteor but died while doing
            so.After Sailor Moon died Fiore transformed into
            his child form.He gave Darian the flower of life that
            revived Sailor Moon.