Kei is a character from Parotte!! Fighter, a doujin game for PC made by Retsuzan which parodies characters from different classic fighting games like Street Fighter, Fatal Fury, World Heroes and others. That character was released in 1st april from 2011 and is slightly incomplete. If you still wish to try out, then here is the link: http://forum.paodemugen.com.br/index.php?showtopic=10890
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Kei is a character from Parotte Fighter.