Rebecca Miyamoto.
Why?
First meetings.
Asuka: Little prick, you dare to insult me? I don't care if you're a fellow pilot, you better use your other head if you want to get any of this!
Shinji: Oh my. . .
Kaji: Asuka, vulgar gestures are not- oh I give up.
Meeting Pen-Pen
Asuka: Okay, so Misato likes beer, which is good, but she likes it chilled, which is not. Pen-Pen, your mission, should you choose to accept it, and you better, is to warm these cans with your body.
Pen-Pen: Wark!
Asuka: I know, I know, but you live in the fridge anyway.
Meeting Hikari
Hikari: Hello, I'm Horaki Hikari, the-
Asuka: Jeez, you're a plain-looking girl. I suppose the freckles are a plus, but everything else is *thumbs down*
Hikari: . . . *sobs*
Meeting Sahaquiel
Shinji: A-Asuka, please don't hide behind me.
Asuka: S-shut up! I'm the top pilot, you know! Hau hau haaauuuuu. . .
Meeting Lilith/Rei
Asuka:. . . You can't make me join you.
Lilith/Rei: Do you not want to join the rest of humanity and become God?
Asuka: I already know God. He lives in our refrigerator.
Meeting Rei
Asuka: Say, do you mind dressing up in these.
Rei: I do not see the point of-
Asuka: Just do it. And wait here, while I get my camera. Hehe, I'm gonna make a killing on 2chan with these pics!
And you don't have to change too much of her personality even.