Zeniba: I'm sorry my sister turned you parents into pigs, but there's nothing I can do. Its just the way things are. You'll have to help your parents and Haku by yourself. Use what you remember about them.
Chihiro: What? Can't you please give me more help than that? It feels like I met Haku, but it was a long time ago...
Zeniba: That's a good start! Once you've met someone you never really forget them. It just takes a while for your memories to return.