"I can see that." Hannibal nodded. The outward differences were something some people might have let slip by, but he could not. "But I know no other name to call you by. You are free to fill that gap if you wish, otherwise I'll have to continue to use his name to address you both."
He gave thought to the question he might like to ask most. "How did this split happen? You and him. Was it always so, or was there a moment, a catalyst?"