C47 Who's on the Other Side of the Phone?

I couldn't hear the voice on the other side of the phone. I didn't know if it was male or female on the other side. I could only hear An Yunxuan's voice.

During this phone call, An Yunxuan displayed a cheerful and lively manner that she had never shown before. It was completely different from when she was facing me, or even the rest of the family