I've noticed that too, and I was even gonna make a topic about it!
It's just another one of those quirky things about the castle that was put there to make you go "hmmm..."
Lets stretch things out, thought I'd bring it up here

notice the portrait on the top right, barely visible but i see it as a reference to Paranoia!!!

here's another looong stretch!

the 2nd icon to the left
for some reason reminds me of one of Soma's transformations
