One part of kingdom hearts I find fascinating that I don't see get talked to often is the way that Keyblades and key culture is a dying art. A giant culture with philosophies and martial artistry and uniforms and this extensive history just slowly got whittled down until there were maybe four masters left and only a handful of students. The second keyblade war could barely count as a blip in the grand scheme of how many keybearers there used to be. Xehanort's desperation to not let go of the past as one of the last traditionally trained masters, the revival of the art by the novice who was never supposed to wield the weapon in the first place, the lonely state of keyblade mastery as a whole... It's very poignant just how much was lost that a culture that once filled an entire planet can now all be accounted for in one room
