There should be a mandatory trip for those authors writing european style fantasy to a sword range to see their "all-powerfull" katanas get destroyed by some longswords or zweihander. You'd think an MC that learned sword fighting from the best knight would understand that sharpness isn't a property unique to katanas, and that any kind of weapon has its specialty.
Also, an axe for the maid? No range, no gard, no balance, hard edge alignement. A spear or naginata would have made better sense, or a rapier, since he can make it unbreakable with his magic.