Cultivators. I'm making an assumption about magic in other worlds, but our magic is less 'magic' and more an offshoot of cultivation, the use of internal energies and heavenly energies and other energies present in the world. Working with the laws of the world, or against them, can generate all different effects. So... cultivator! Is what I'd say.

Hah! Yes, you're right about that. Besides, on a train like this, maybe firefighting is something else we could get used to practising.

( He winks. Though he's also serious, since who knows when someone in this contained space ends up setting a fire... not that he knows the extent of people's abilities, but some probably could have that covered if on hand. Still! )

Either way, thank you, your willingness is a credit to you! And the rest of us. I'll figure out more of the workable details and get back to you and the rest, then we can reach out to the train as a whole with a training schedule for those willing.