Ah, true. It seemed that Tamaki's plan of an even balance had a fault in it! He looked at Ky for a moment, an idea brimming to the top of his thoughts. He was determined for her to join the Host Club, and to enjoy it! And most of all, he wanted her to be happy. The blond was a Host who truly did care about his guests, but couldn't help being drawn to some particular cases. 

"We will see what happens," he declared mysteriously. 

((I think that's a good point to stop both of them there? 
The prank could be intended for Tamaki, but backfires on Mimori. Perhaps Kaoru feels bad, while Hikaru doesn't care (or pretends not to, due to feeling jealous. whatever suits him best :p).))