An employee of NEXON INC. from 1996-1999, he was regarded as the first Game Master of NexusTK. His real name is David Kennerly, and he is a prominent and respected American game designer. He has written essays on game design and contributed to books which teach game design at the college level.
He also worked on two other NEXON INC. projects; Dark Ages and another unreleased Nexon game, Elemental Saga.
http://finegamedesign.com/ : David Kennerly's Game Design webpage