Okay, I'm saying this one last time and not having any more argument on random trivialities: dullahans are not psychopomps [i]by the word's definition[/i]. That is not, in and of itself, enough of a problem but it's not helping. The whole feel of the train doesn't fit that well--and nor does the invisibility actually make any sense, especially in Gensokyo. If a self-railing unstoppable train [i]was[/i] going to be included within the setting, it registers itself as one of those  "big incident" things that I'd rather include later rather than immediately removing any slice of life scenarios.

And finally, there is [i]no reason[/i] to have multiple characters doing the same effective job! Especially not one so reliant on "Well, Eiki has forgotten how to find Komachi".

PS: western ideas are acceptable. But the cultural history of how various youkai came to be is completely irrelevant. <_<