I like the fox girl (Miyabi) much more than Elia. I don't know why but she's kinda annoying, there is just something about her that's not very likable imo. I wish she would grow on me eventually. But honestly, I would absolutely hate it if the author decide to cram in some romance in the future, simply because THE STORY DOESN'T NEED ONE.
It's already super great as it is, introducing a love interest only works if done tactfully and so far it only feels forced...I'd rather watch Ryouma opens 100 more stores, level up and live happily ever with slimes, than him and the noble girl smooching.