Yukikaze (ユキカゼ) is the younger brother of the Trainbot leader Shouki. Cold-weather operations is Yuki's gig, and in the snow, there's no stopping him. Naturally, he doesn't like heat at all. So much, in fact, that it severely hampers his ability to work with Kaen, who apparently puts out a lot of it.
His alt-mode is a Tohoku Joetsu Bullet Train.