Board Thread:Fun and Games/@comment-27524978-20160317154321/@comment-6576725-20160412184950

Don't forget Aaron which is probably your name apparently that if you go back to the beginning of the game after saving Asriel but before leaving the underground Asriel mentions that Chara hated humanity and that it was also implied he really wanted to kill the humans but Asriel did not want to. So with all those hints it seems that Chara does represent the player's genocidal tendencies in Undertale or even other RPGs but is only revived during the genocide run.