Listen, maybe I’m touchy or whatever, but if the only way you can make your Levi-plus-whoever-ship seem even more romantic and clandestine is to make Petra jealous, nosy, and flighty, then you’re fucking characterizing her wrong and get the fuck out and never touch her again.
The woman is grace incarnate, and even if she was jealous, she wouldn’t ever be petty. Ever.
AND if you make her this way at the expense of the warmth between her and Levi (which is there regardless of what kind of warmth it is) or her and Eren (which is ALSO THERE) I will fucking flip a table.