She spends an inordinate amount of the series rolled up into a sleeping bag, so I'm guessing there aren't too many like it.
As for the ending, it makes more sense in the game, since it works off playing multiple routes. Worth playing through, though it's still going to wrap up the same way. Nice to see the other routes at the very least. Artwork was definitely improved for the anime, though it's still better than their earlier works (Kanon's pumpkin shaped heads is kinda off-putting, personally.)
Anyway, there's a movie if you want a different ending (or so I've heard), though I don't know if that'll make you any happier.