As per https://scifi.stackexchange.com/questions/291360/in-chosen-one-protective-service-does-everyone-get-the-diagetic-interface-int, is Rusty's chakra interface relatively unique to him, or do all of the rune users get exact numbers for their chakra levels and how much a spell will cost? Part of me feels like the interface might be the result of his first rune being that of Memory.