Moe Lenin was only really adopted because /ref/ needed a mascot to appear alongside Cirno on /GET/-/ref/ friendship material and because of a user by the name of Comrade Lenin who stopped coming here a long time ago. Prior to that contact with /GET/ in late 2013, /ref/ didn't have a mascot. After /leftypol/ adopted Alunya in early 2015, /GET/ switched from Cirno to Rodina, preferring an original mascot (like with /leftypol/ and Alunya) to an already existing character (like with 4chan and Yotsuba). Following that, /ref/ followed pretty soon after by creating Tania.
Oh damn, never seen lewd Tania art before. Breddy gud. Looks to be resized and had the background a bit messily cropped out, though. Got the original?