Just as well I plan on mainly playing a relatively peaceful MC who is more inclined to get along with others than not. And that includes Shay, so... He'll be suspicious of Alister's romantic partner at first, sure, but if everyone goes more or less unthreatened by this lover, then he'll treat them the same as any other race--with respect while getting to know the person inside. By light's honor, he will! This is his promise to Ali. ;D
That would be a wonderful attitude to have towards the MC. As well as towards the other demon ROs, like Lillian. As she doesn't necessarily want to fight you either but she's very tense when it comes to the Dracaryean and other demons. (Salith on the hand is a whole other story.) So I think your MC would get along splendidly with all of them.