Zypherin is a high stakes cash game player who plays both NLHE and PLO, and account is believed to be of a Canadian citizen as it was registered in Canada before Black Friday.
There are strong rumours that it is the account of Cirque du Soleil founder, Guy Laliberte. Many high stakes pros who have played in the same games as Zypherin believe that it is Guy because they have previously played against screen names which were believed to be his on Full Tilt, and their playing styles are very similar.
Zypherin does not play on PokerStars on a daily basis by any means but when he does play, it is generally for a long session of 8-12 hours at $50/$100 - $100/$200 NLHE or PLO, usually the latter at the deep ante tables. He has played at the $200/$400 PLO tables in the past but generally sits at the lower tables, maybe because its easier for him to find action there. He has unfortunately not done so well in the games and lost over $1 million in 2011. He lost over $2.5 million in just the first five months of 2012.