@SprinKah Mashiro's love for Toramaru is more along the lines of adoration for the strong girl who constantly defeats her.
Whereas Mashiro has been with Yutaka for a long time, far longer than she knew Toramaru.
@VonLoewe Based on the Volume 8 cover, Ueno at least has a possible backup future-spouse. I mean, think about all the things our poor glasses girl has endured for the sake of Ueno's crush. If that isn't true love and devotion, I don't know what is.
With how much Eleking likes Red King, and the instances of Red King flirting with Mefilas, the ending is most likely going to be Red King × Eleking × Mefilas.
Seriously, which will she choose: human wife or demon wife?
Or will she somehow manage to foster peace between the two races, and then marry both girls?