Oh look he now has a fellow Engineer who's pure Steel-type and has no attacks who also is looking to explore the Old City. Banzu can reshape metal like it's clay and he's pretty good with machines and technology in general, which is why he's working in the labs when he's only 16. Perhaps they could be working together?

Banzu would, however, appreciate it if he was valued for his mechanical skills rather than his ability to magically fix stripped screws.