Could be a very subtle joke. Presumably, because she is related to Frankenstein 's monster, she is made up of lots of different people, some of whom may be male and some female, so she is one of the extremely few people for whom non-binary and they/them are actually correct.

Yeah it makes sense! Frankie is also a neutral name.

Also, what the heck, Monster High has a live action show now??!!!

This looks like a parody of Monster High.

Seems like a new Live Action show based on it... They did a Live Action show based on Winx too I think...