The main character is bisexual and Rosie's father is also bisexual. Elias is also implied to be queer. There's a non-binary side character, Rosie's best friend, Quinn. 
 
I've read all of Ashley Poston's Once Upon a Con series and this is by far my favorite. I loved the elements of grief - personally my favorite trope in books. I loved how meticulously she got every beat from Beauty and the Beast and put a Starfield twist on it. This was such a clever book and I loooved the characters especially Rosie's friend group!  I really love this series and this book took me on a roller coaster of emotions. Highly recommend