https://en.wikipedia.org/wiki/Doctor_Yellow'Because the schedule for this train is not made public, witnessing it in action is a case of chance. As a result, seeing Doctor Yellow in operation is believed to bring the viewer good luck'
By virtue of they no longer being on the permanent traincrash that is Kurosanji, those who left that and got on the Total Niji Death train always have good luck with Dokibird being their driver:
