Thanks everyone. I eventually decided to just use my sterile tweezers to nudge it off. I used a rapid rooter seed starter to plant my latest girls.
One of them (the other, without a seed shell stuck on her) is nice and straight. But this one, even now without the shell, is curved and leaning. My last grow I had the same thing and she never straightened back out, and I had to remove her and replace her with one of my backups.