We are clearly on the same page here. It's just so adorable! "I'm human, but I don't want anyone to know. Except...well, I want to make a good impression on that one."
*accidentally makes a complete fool of himself*
"I AM NEVER TALKING TO PEOPLE AGAIN."
Ah, man, I love that. It's my favorite thing. And there's still time to retrofit it on him, but I think I'll keep going with hasty and bumbling. 
Don't worry, "cool and quiet but with hidden depths". I'll come back to you some day.

Also that's not much of a Fuko daydream if there are no starfish involved.