A man fond of cryptography will always be in encrypted-mode, that is Satoshi is known, its been more than a decade yet no one still knows who the hell is this person.
I've read that both theymos and Sirius hadn't any special contact with Satoshi. Sirius purchased the domain, helped by spreading bitcoin and theymos was later an admin on this place. (I believe that satoshi gave him the admin role)
Sirius gave and took over the admin role to theymos
Satoshi created the forum on Nov 22, 2009, and was head administrator until almost 2011. Then Sirius was head administrator until 2012, which is when I took over.