James Potter is here as well. The train really doesn't discriminate between living or dead. In some ways it's a second chance, I suppose.
I'm sorry Tonks. I'd seen you at Bill and Fleur's wedding not so long ago, that was pretty much the last time we saw any of you. I know. It's wrong. So many things are, but you learn to adapt. He's Harry, but he's not quite the same best friend that I remember, we're getting there.
There's also chance you might run into my daughter, Rose, who's about 5 years older than me. So, the train is certainly not exclusive to only our past or present. There are all sorts of people here.