I guess I kinda already did it a little bit in my last post, but when Qi is being used, is there any kind of indication of it? Glowing auras, energy flowing from the impact of an attack, anything like that? Can other people capable of manipulating it sense that it's being used nearby, or sense that a person has a large/small amount of it? Basically, how many power level/spirit pressure/haki/etc tropes are associated with it?