"Who is that girl?" asked the grandfather to Anan.
Anan was silent for a moment, he was confused whether he should answer that the girl behind him was a young lady, the only daughter of a famous person in the city of Y? That means that Anan is the same as revealing Casandra's identity, whereas all this time Sam has been very protective of her. Not many people know about the young miss.
"She..." Anan fell silent again. Casandra immediately stepped forward and then stood parallel to Anan
"Introducing Grandpa, I'm Sandra" Casandra said holding out her hand to the grandfather.
Anan was a little surprised that Casandra wanted to answer in the midst of his confusion, but he forgot to mention that the way to respect the grandfather was not by extending his hand to shake hands, but bowing respectfully like what Anan did earlier.