I hope it works out for you, but if I were your girlfriend, I would have prefered to do this in real life with the guy that I would stay the rest of my life with it. Remember this is going to be a magical moment that you guys are never going to forget and you share this with your friends, parents, inlaws,children and grandchildren. Are you sure, you want to do this ingame and not plan her something magical in real life? I dont know your girlfriend and maybe she prefers a ingame proposol, but for alot of girls this is a moment where they want to be the princess waiting for their prince on a white horse to sweep them off their feet.

Now if a Square Enix employee does this for you, then you need to remember this will open a box of requests. Other players who want to have the same thing like you, will request it and Square Enix need to do the same for them or else it will be favouritism/discrimination. The shitstorm that will hit Square Enix will be hard, if they do this for certain players and not others.

If this was Ragnarok, I would have come with my Scholar, but sadly I cant. I do wish you the best, but I also hope you rethink this and ask yourself if this is something your girlfriend realy wants? Or is this something you like to see happen?

PS: I am curious why is a ingame proposol the most fitting way for your girlfriend and you?