When does the KO happen when reffering to roque;s ability. If she attacks someone and stuns them, does that chracter immediately get KO'd or do they get to attack back, then get KO"d. Basically does the KO happen immediately or at the end of the entire combat round?

During attack resolution, when the character becomes stunned.

You still need to compare the defender's ATK value to Rogue's DEF value to determine if she gets stunned too.

thats what I figured, thanks for the help.