(6)Parvati Patil
(11)Bane
She and Lavender do have some fairly hilarious antics, even if Lavender obviously scores higher due to book 6. But really, this is a bit of a tossup, because neither Pavati or Bane really do anything. Pavati only gets the nod, because it took me a while to remember Bane at all....
(3)Cedric Diggory
(14)Hannah Abbott
Ok, as far as random hufflepuff girls go, I actually find Susan Bones more memorable than Hannah Abbott, probably because of her connection to Madam Bones. But...yeah, matching "lesser token hufflepuff female in Harry's year" against freaking Cedric Diggory seems a little unfair.
(7)Filius Flitwick
(10)Kreacher
Absolute slaughter. Kreacher is a top tier character. Flitwick really doesn't do much.
(2)Ginevra "Ginny" Weasley
(15)Rose Weasley
Rose? Who the hell is rose? *googles*. Oh, epilogue character. Yeah, I'm inclined to take the stance that pure epilogue characters shouldn't be nominated; possibly excepting Albus Serverus Potter, because he actually gets some screen time and a chance to show his own personality.
--
Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision