[ShadowFox2004]

I have a theory on that...but then again my theories usually turn out to be insane and/or illogical, so maybe I'm not the best person to listen to. However, all my theories in the manga before this have been true, so I'll take a chance on telling you what I think:

Spoiler for Chrono Crusade Manga Ending:

I found it odd that Chrono just burst in at the moment she was dying in the church...I thought about it for a little while and came to believe that he was already dead and was waiting for her to die so they could leave on the train together. As he said, his home is with her. So I'd find it odd that he would just go on living while she was dead when he said that he would always be with her, and I didn't think that he would avoid seeing her if he was alive until the moment of her death.

But, who knows. That's just my two cents!