I think Shinji's pumpkin is carved into Sachiel's mask, while Rei's is definitely Zeruel's. I've got nothing on what Asuka's pumpkin is supposed to be.
Now you might be wondering, why did I put "trait connection" in the list of tags?. Because Cure Earth, Ultraman Gaia, and Agul have something in common, that being the fact that they're the physical manifestation of the Earth's will to protect the planet. In other words, they are Earth-born heroes. Yes, really.
