She hops down from his shoulder onto the bench once they are close enough, half fall, half batting of wings, and then changes.

It takes about ten seconds, a contorting and stretching that looks so uncomfortable that looking away might not be the worst option, and then a tall, unshapely person in a green army coat sits on the bench, big dark boots poking out from under it.

...Now for words. Those are harder.

"Why are they following me and not someone else?" There are a number of vampires in this city, she knows that for a fact, and if someone wanted to snatch a body... really, they could get something more useful. Not that she's ready to give it up, but if she was a bodysnatcher and had the ability to choose...