Kitari won’t die
she is locked to be Heki’s wife
she is locked to be Heki’s wife
Sou'Ou is the obvious candidate, but who's to say Hara will leave it at just one? Some might find it cheap and/or cliche, but I can see Kitari dying just as Heki is set free - like an inverse of Sei Kyou and Rui (who Sei should've pressed Shin into marrying to advance his faction, thereby incidentally making Shin the Lord of Tonryuu, but I digress).
Don’t think Futei will die as well
He has been around for like 500 chapters. In that time he has risen to the rank of general and become one of Ri Boku's most trusted swords. I think he has served sufficient purpose that his death would be fittingly part of the bloodiest battle in Qin's unification wars - I think it makes sense Ri Boku suffers this loss, at the hand of Shin preferably.