No unstoppable invisible trains. Was I not clear enough on that part? Especially not trains that would therefore be invisible to almost every playable character the series has had, discounting the pair-ups and Mystic Square. 

And it [i]still[/i] doesn't fit to have a Dullahan doing Komachi's job because: A) Eiki doesn't let her slack for that long, and B) [i]dullahan are not psychopomps[/i].