This character has always reminded me of a very strange last sentence uttered by Kirk at the ending of Plato's Stepchildren
He is bringing Alexander
up to the Enterprise and he says to Scotty:
Kirk to Enterprise. Mr. Scott, prepare to beam us up. I have a little surprise for you. I'm bringing a visitor aboard.
"Little" reference aside, why would Scott be so surprised about this particular visitor?
Could Scotty be heartbroken over the loss of a old friend who happened to be a short little alien and Kirk is hoping to cheer him up?
That is the first thing I thought of when I saw Keenser and Scott together.