When A$AP Rocky revealed the tracklist for his sophomore album, A.L.L.A., somehow the most interesting news wasn't a Kanye West feature, nor UGK or even the elusive Mos Def. Nope, all of those marquee, beyond-standard-fare guests were overshadowed by the name Joe Fox, which appeared a whopping five times across the 18 tracks. You may have seen it and ran to your nearest corner store music blog, thinking you missed something. But we were all asking the very same question: What the hell is a Joe Fox? Is he a new member of the Mob? A new guy on the rap scene? An alias for guest narrator Jaden Smith? A bare bones search result via Google only fueled the mystery's fire, although his Twitter and Instagram profiles were easily found. Fox appears on roughly a third of the album, tackling hooks with Rocky ("Holy Ghost," "Pharsyde," "Max B") and sharing the bill with bigger feature names like Future and M.I.A., and Yeezus himself on "Fine Whine" and "Jukebox Joints." And yet, he's still very much an enigma. Between his two social accounts, a very rare interview given to i-D, and a brief mention in British GQ, here are all the pertinent facts you need to know about Pretty Flacko's new protégé.