I vaguely recall a free-standing mirror when we were in the Horizon Suite. This goes back awhile, before the Horizon Suites had butlers. I had a penthouse on the Mariner last trip (Tokyo to LA portion) and there was no mirror.
BTW, the canopy tour is a must, even if you are 85 and use a cane/walker (you get my drift). Honestly, you are so hooked up that you could do it if you were 85 years old,
M.