Arkinslize
I don't know how people support this Ruby gal to be the love interest. Aside from the very early appearance, nothing more. She even did horrible things to other people even to the MC. It is like Sarah 2.0. It is much even better for Ruby to be the main antagonist or the MC's rival. Base on the way how the author like to make things realistic that can be explain by logic even on a novel, I expect he has something in store. As for the love interest, I don't really care. As long as it is not forced like the oracle told you "she's your soul mate BS", I prefer someone who has been with him from thick and thin better if from the time when he was not that strong. From these I have two, Enya or Xi. For Xi, she just needs to have a body and for Enya, she and Jake just have to make a moment.