Oh they can... If there is onething I've learned about from reading Koori No Mamono No Monogatari is that when a bad guy who wants to destroy/ rule goes up against a guy who loves someone else - be they bad guys or good guys - the one wants to destroy gets put down. HARD.
I don't think they will be able to beat Hoshiminokoto.
I feel like there is no way they could, but I really hope Rakan and Chigua can be together.