After pushing the mysterious MRP button, it pulled up an MRP window! I thought I was going to die, or was hallucinating. I took a few more screenshots. I thought of snipping them down for size, but here are the unedited shots;
I'm sure there ARE ways to fake this (though I think MRP always puts the character's 'real' name in that top bar), but I swear on my highest level characters and their ability to reach 70 that these shots are unaltered.
After I selected a player who ran up (I was hoping they would have an RP addon so I could ask if they saw the same thing), I reselected Ishanah and the MRP button was gone.
I also received this error information. I don't know what it means, but I'm certain it means something.
Edit: After some small research, it seems there is a player bearing the name Ishanah on the Kirin Tor server, and I was likely somehow picking up her FRSP information via the NPC of the same name. Interesting.