That is correct! It is called so because it attaches itself to one's head, and the host then becomes a steed upon which they ride and order others to battle. My good friend Ser Heathcliff was attacked in such a way, and once his face had been freed he was able to wave them off for a time. It was interesting.

[ ... hold on she's just getting up and leaving for a moment to get a pen and napkin-- okay she's back sorry she didn't say shit. here's your bongy, admittedly stylized a little cuter and more of a focus on the Rotund nature. ]

Is it not adorable?!