User blog comment:27finnsprincess/The Talk About Marcy and Ice King.../@comment-99.176.59.97-20121013071047/@comment-4978104-20121013215740

I think PB might be Betty. I mean, for one thing, PB doesn't seem to age. She appears to be the same age now that she was when "Princess Cookie" was a child. Also, she loves math and science, and in the picture of Betty and Simon, Betty had a labcoat.