I didn't, at first. But Natsuo said we didn't actually have to be related to be a family.

[Xion stops fidgeting to reach out for Sophie's hand. Her voice is soft.] They weren't really replaced, though. Even if the memories were hidden, even if it seemed like we'd forgotten at the time... They're still there, in our hearts. Nothing could ever truly replace that.

[Even though she knows this, it still troubles Xion she forgot in the first place. She knows those memories and people are still there in her heart and always will be, but... It's important, to her, to be the one who consciously remembers. So that, at least, someone does.]