Commentary was taken from the tweet it appeared in. Bing Translated comes up as "[R18] ran like normal reverse in position to reverse rape and" so I'm assuming it's some character from Touhou? I could be wrong. Tweet in question: https://twitter.com/uav_recon9/status/615184772927651840/photo/1 .

ToastedWaffles said:
Commentary was taken from the tweet it appeared in. Bing Translated comes up as "[R18] ran like normal reverse in position to reverse rape and"

藍 is the Ran in yakumo_ran (八雲　藍).