Alien Prince Charming

the antagonist is far too evil without sufficient reasoning... Also why wouldn't the FMC just go to the prince (with all the security and intel) and say ‘hey keep it quiet but your head chef is holding my sister hostage, can you help?' doesn't make much sense other than for plot

Also the prince not knowing she was the one the device was pointing out, especially after eliminating all the other candidates is just willful ignorance.