User blog comment:Omega natsu2/Chapter 356: Tartarus arc - Prologue, Predictions./@comment-4938779-20131011000121/@comment-7418318-20131011075458

It's already been explained twice in the comments of this very blog, but sicne "three times' the charm", let's go another time...

Go to ChaosKnights user page and leave it a long message in which you explain what you like about it. Despite Chaos being genderless you have to pick a gender and refer to it as either a man or woman throughout that message.