ギル様を含んでいないとは、貴様それでも人間か!?
Spoiler for well, game spoiler, I suppose:
Gilgamesh's return in the final Broadbridge battle in ataraxia, it simply broke the coolness scale.
They shouldn't have split him up from his "other" form in the poll though...
Besides that, Lancer's casual side in ataraxia also earned big points with me. This man simply has no luck.
Before ataraxia though, my favorite would be Ilya (well, she's still on the top of my list even now). Not because I'm into loli or anything, mind you. Simply because Ilya is capable of being both the most innocent little girl and the most mature sophisicated individual you have ever seen at the same time.