THIS IS MY NEW HEAD-CANON.
Charles is Christopher Robin. When he was a wee!Charles, before Raven, he would use the Hundred Acre Wood to escape how lonely he felt. The woods were bright and open, unlike the stifling halls of the mansion. There were places to explore and games to play. And in the woods, everyone was happy to see him.
ETA: ..So I saw Winnie the Pooh last night. (: I really should have gone wearing my Potter robes, so I could walk past the terrifyingly long lines for Potter while still feeling like part of the event. And walk up to the ticket booth wearing them and ask for "Pooh, please."
The movie was very, very good. And it was so funny! It was all adults in the theater, and we were all laughing. I'd very much like to own it, once it comes out.