[His expression softens a little.]

My sword, Hotarumaru, is something that I inherited from my parents. It's been passed down through my family for generations, and it's strong and reliable and never wavers. If I couldn't wield it properly - if I wasn't good or strong enough myself to compliment its strength - then I wouldn't be able to honor everything that it's done for us.

[The way he's discussing it makes it sound more like he's talking about an Actual Human Partner™ than a sword, goodness. But his fondness is genuine and he wears it openly.]