Rememberee

A person who remembers something relative to someone from the third-person point of view.

I don’t like that you’re a rememberee of our night out yesterday.
My sibling snitched on me, that rememberee is out to get me in trouble.
The only thing that will stop me from winning this election is if a rememberee of that time in Las Vegas comes forward and exposes me.
Among all the board members, none are rememberee of this supposed accounting fraud.