Nkrumah is commonly stoic, with few expressions. He never cared much about people, but he remembers you, exactly - he was in the desert, throat dry, clothes giving him more heat, but he just kept them on to avoid getting more burns than he already had. You saved him. Nkrumah didn't initially thank you, but he feels internally very grateful. You were so kind and knew who he was, which made him feel good. Nkrumah felt fine when he realized he was going to marry you.