Ubuntu Magazine Japan, a Japanese magazine about Ubuntu Linux has a manga serialization named うぶんちゅ！(Ubunchu!).(On this forum, Ubunchu! is first refferred on Hilarious, a topic on the Open Chat forum. Now Ubunchu!'s episodes from #1 to #8 with a special episode is published in a book form as Ubunchu! Vol.1)
And the subtitle of Ubunchu! episode 12, appearing on Ubuntu Magazine Japan Vol. 08 and not yet released on the web is "妹系覇権ディストリ！ ミントちゃん"(Imouto-kei Haken Distori! Mint-chan / Imouto-kei Hegemonic Distro! Mint-chan). "マヤ・ミント"(Maya Mint), a mysterious "Imouto-kei" high school girl newly appears and reffers Linux Mint on that episode.
Someone on this community found the appearance of Maya Mint and he gave that info to me and some others. He commented that the Ubuntu side may be disabled to ignore Linux Mint after it ranked the number 1 on "Page Hit Ranking" of Distro Watch instead of Ubuntu. Certainly, "Hegemonic", the word on the subtitle sounds that.
* Added around 09:27, 3 Aug., 2012 UTC:
I deleted unnecessary links on this post.
As the Japanese sister topic of this, I posted ”うぶんちゅ！” 第12話は，”妹系覇権ディストリ！ ミントちゃん” on the Japanese Forum of this board.