As one who did not know Mamselle's RL identity, I can unequivocally say that I have no interest in knowing her RL identity. I only knew her as an online person named Mamselle. Knowing her RL identity would add nothing to my immense appreciation for her and her monumental presence here in the fora while she was still alive.
I remember on the old CHE forums when the news of the passing of Prytania3 was announced. Someone revealed Pry's name. I was curious, so I googled. I soon forgot Pry's real name, because that was not the real Prytania3 to me. The "real" Prytania3, to me, was the online text-based representation in the CHE fora.
Although it may be tempting to want to know, knowledge of Mamselle's real identity is neither necessary nor appropriate.