The JR Shikoku Anpanman trains were a bit disturbing for me and I've been on the Rilakumma train with jet lag. I sent photos to friends asking which Anpanman character was the most ominous or high. They're even on the interior ceiling staring down at you.

I have to give the Hello Kitty version a few points for including gachapon machines. Perhaps the other cars have less interior theming?