[Elizabeth's little smile is enough to get Gai to try for one of his own, though he still feels uncertain about this whole situation. He's not used to feeling uncertain about anything, and it's still an odd sensation to stomach.]

A person's heart can change its shape as the person themselves changes. It's possible that what he pulled out one day would be something completely different in a few months if they changed that much during that time. The bond between him and that person, how the person themselves feels... all of those things can affect it. But mine never changed, not since I first realized that I was able to see what it was.