For those not in the know: I just found out that Nana Himemiya is the mascot for the Toubu Passenger Center. That's according to this page (with English attached): http://plaza.rakuten.co.jp/thanarail/diary/200806250001/

駆け込み乗車 (kakekomi jousha): "rushing to get on the train (bus, etc.) before the door closes​".