Admin Harmonie R. is one of the lead admins on the Infinity Ring site, posting the very first post onto the Forum. Though she does not go onto the Forum often, her presence is most definitely there. Ironically, she has probably posted more on the 39 Clues Message Board than on the Infinity Ring Forum.
As of February 22, she has made and commented on two posts there.
She has also posted on The 39 Clues MB, and has become a "main admin" there. She posted regulary on T39CMB for announcing Agent of the Week every Thursday, however, there have recently been no "Agents of the Week".