Meta Knight would be a hard knocks mentor, wouldn't he? Especially when Noir is someone a lot more sharp and aware than Kirby, who he already trains by sending waves of hostile knights at betweenchonor duels. He also has that darkness and pain in him that I sense Meta Knight knows all too well. Well enough that he sure doesn't get the (relative) kid gloves Kirby gets.
Oh god, yes! If that's how Meta Knight trains Kirby - and this is mostly to keep Kirby ready in case of disaster and prepare them for their destiny (we assume...?) - then training Noir, an angst-ridden, self-destructive teen who is about five seconds from throwing himself off the nearest bridge on a good day, is definitely going to have Meta Knight use the "break you down and rebuild you from scratch" style of teaching. Which, frankly, Noir could probably use.
[Cont'd + Other Apologies Asks]