I initially asked my question on sof, which I now realize is clearly the wrong place:
So, as the title indicated - someone who is not my friend, neither to whom I am following, +1'd my post on google+, how could I then go follow him or add him to my circles? I got the notification, which shows the person that did the +1, but there is no link for me to access that person's profile page. And I searched the person by name, tons of having the same name!
I'm trying to post it on the correct site now, so I thought it best to ask here rather than risk adding noise in the wrong place again.