K.O is one of the best and most popular Japanese 3rd strike players. Despite being one of the most famous players, he has never won an SBO (Tougeki) tournament, a regrettable fact that he is often noted for. He is known for being able to play multiple characters at the top level. His most prominent characters include Yun, Yang, Makoto, Ken and Elena. Having started off with primarily using Yun, he switched to Yang in around 2008. K.O is short for Kenzo, which he also uses at times.