@Sniperking
She didn't order any fish, it was the guy all along.
But yes, her plan was to order some, then say some prayers for it and leave. Her aching tummy made her lose her appetite, so MAYBE this time she could have done it properly.
Fukurou couldn't possibly know Hal knew Usogui's next number. Hell, even we as readers still don't know how he did it, and he has way less informations than we do. The blame is all on Lalo.
She actually doesn't, though. As far as I can see, when she tries to "seduce" men, it's just bait in order to lure out the Demons. She never goes beyond simple teasing with men, compared to the pretty explicit stuff she does with women.