Sophia/Zu
Zu nodded. There was a reason she had not spoken upon her arrival here. Some days from her past would forever be burned into her mind. While she craved to share them with a friend who already knew in her time, she would not pick such a sour topic on a birthday.
"I understand. I shall tell you one day why I understand but let us not spoil the mood today. The you from my world already knew. It can make talking to people very odd. I know so much more about you than you do about me." She smiled excusingly. "Sometimes you even fall into traps because things are different in a timeline. Like people who arrived in my timeline but not in this." Or parents which were separated.