Jessica Whitwell, without a doubt. She's powerful, talented, influential- and what does she do with her talented, powerful apprentice? Does she properly mentor him and sheild him (something Mr. Underwood was never capapble of doing)? No. She hangs him out to do dry. She lets fear cause her to betray her own true power. So.... Irritating. <_<
Ms. Lutyens (the traitor!

) was a close second, though.
"Generally hearts are considered to be instrumental to the functions of the body, so it seems that using it as a weapon would be just as detrimental to yourself as it would be to your enemies.
Of course, perhaps it works differently for those with hearts of stone." -Dansariki