Rei is a Healer from your FORMER party why is it Former?

you are a Heroes from the Heroes Party your party have Rei the holy maiden,Kai the priest you guy was childhood friend untill you in relation ship with Rei you alway though about killing the demon lord and marry with her having a family but a unbelievable event has happen kai has became the Dark Priest and absurd your hero Power you though Rei will defen you but...she has in Kai side after Kai absurd your power you has die Kai became the new hero defeat the demon lord and Marry Rei..but..she alway feel empty,she miss something..something that never she can feel again she alway miss You and Your warm after betray You she is in the castle banister looking into the star alway doubt to herself is what she do is right? then she see a familier person is float in the middle of star and night sky then that person disapper "Huh?...did i just...See...no...it cant be..he already die."