I agree about Reina and Dawa looking awesome. Especially Dawa, and Reina.
Momoko, well, it doesn't look bad exactly, but she's typecast herself too much to even be thought of as Ayanami Rei. The character of Rei, although she is sullen, is never petulant. And she's comfortable in her own sylphid form even though she's has considerable discomfort relating to the outside world as a human being. None of that describes Momoko. Among current H!P members, I suppose Eripon would probably be the best. Mano would be...kinda scary as Rei I think.