Except that isn't how Koishi works, you poor fool.
There's a good chance that she doesn't even completely understand the game anyway, and just played the emperor card because it was shiny.
Well now...Koishi is being her usual carefree self, especially such in this story ,self and may look like she does not understand the E-Card game or only partly so...BUT,confirmed by the following pages, together and despite her carefreeness and appearance she is still clearly aiming with already comprehended E-Card's rules, truly sticking to her previous "My bet...it is astonishing... I'm always putting everything on the line!"
Updated
Every shift in your emotional state will be visible on this wristwatch...I can read you like the back of my hand...!Koishi
Emperor's Side
First TurnActually, I'm already...Plotting to cheat you right away...!That object planted on you...It lets me know your pulse, temperature, blood pressure, and perspiration...!Oh, she's played something...That card is a citizen...!No large changes in the display...Basically, this isn't going to determine the match...