I know that if The Observer watches the target that The Possessor sends a Puppet Strings target to attack, they’ll see the person being manipulated by Puppet Strings as the visitor. (That’s part of the point of Puppet Strings, after all.)
But what happens if the Observer watches the person The Possessor used Puppet Strings to control? Let’s say that that person also performed a normal visit (eg. they’re a Sheriff investigating someone.) Does the Observer see them making two visits?