Do you know if he's the younger or older one? That might help a little in figuring that out. But you have maybe four years to go and then you'll know at least Miss Ai.
That would be troublesome in some cases.. But useful in others. [ Like, what if Lord Haruka didn't know him? That would be great in one way. He wouldn't need to worry about glares and stuff. But he does not want Master and the others to not know him. ]