Why Reishin Makes Houju's Masks.
There were a lot of reasons why only Kou Reishin made masks for Houju (Ko Kijin).
a) He was always so innovative, making masks that had adjustable/removable parts that allowed him to eat and drink, even disconnect some parts, if it got too humid and stifling.
b) They were also creative, yet tasteful (unless the bastard was feeling obnoxious, hiding the better ones, and sticking him with the more annoying ones, only to force him to wear it).
c) He was one of possibly one to three people who were immune to his looks, who was capable of m aking such things.
d) He had threatened everyone else, if only to have some leverage over him.
Kou Reishin was simply that kind of person. After all, while Houju's face did not attract him in the least, one of Reishin's favorite past times was still...
Irritating the hell out of the ever stoic and (almost) unflappable Ko Houju.