Yeah, I replied the first time to only Elena and got an automated response that she wasn't going to be back in the office until today.
Then I realized it wasn't cc'd to the other two people, so I resent it but now my message is in the trimmed content part of the email in google. So I'm slightly unsure if they'll notice my acceptance.
I will have to decline the stipend because of my fellowship. In the Japan handbook, it suggests that the $5k is typically declined when people already have other sources of NSF funds.