the Hatsune Miku story is kinda interesting and im not bothered by it. Its off to the side and its own thing. All parties consent and nobody is harmed.
Let me introduce you to the fascinating concept of Magnetohydrodynamics and MHD drives.
There is no magnetic field involved in the propulsion in this case but it is not necessary. This concept works in air, so you could really make a completely silent airplane. There are three major problems though
poor power density
still veeery low efficency
the resulting ionized air ( ions are nucleation catalysts and in big quantity can have a lot of other side effects )