mephistopheles_(project_moon)
A bus with a Steam Locomotive-like exterior that serves as the Sinners' mode of transport and living quarters.
Its engine was developed by ]], and its mirror technology (which allows access to the many ingame alternate identities) was partially developed by [[Yi Sang (project moon)|.
It is operated by Charon (project moon), who calls it Mephi.
In literature, Mephistopheles is the demon that offers the doctor Faust vast knowledge in exchange for his soul.