The “Chuchu” gravity train is an antigravity magnetic train of 2087, built from fallen Sky Metal to pierce reality and reach the throne room of the Dark Queen.
It was Taito’s idea when satellite electroparts — Sky Metal, a pristine blue metal that proved to be the building matter of reality — began falling near the old Refinery and dam. The dam was raised one last time to power it. It took two months to build, funded by a bank hack of a hundred barters and donations of doubtful origin: a ram-ship made of the same material the Master weaves his web with.
In the final incursion, guided by hand by Larkin and escorted by the aviators Johnny Vengador and Tuxedo, it flew over a neon-and-temple Tokyo-York to the floating sphere among white monoliths. Through it the band reached the throne room, and the world came out unplugged. Its predecessor on rails was the red train.