That is a mirror above the couch. If you zoom in, you can see The UP’s reflection. I blew it up & adjusted the brightness to bring it out:
Quality is not good, but if I had to make a guess I’d say that’s Handsome Lad. This was an edit from the original scan, since I didn’t notice the reflection until just now. I’ll try to find the original negative & see if I can make a better scan from it.