Mostly of the characters individually, but most the doujin I have is of them as a ship.
A lot of the Japan stuff is official, whereas the Taiwan stuff is mostly fanmade by Taiwanese fans.
I have straps, charms, a lot of the trading cards (including a couple special editions). artbooks, stationary, and more.
Merch sales are here:
http://ojousama.dreamwidth.org/4551.htmlDoujinshi sales are here:
http://ojousama.dreamwidth.org/4266.html Thank you for looking!