You know, I'm beginning to wonder why anyone would want to keep a yukkuri. They're more intelligent than most animals, but infinitely more annoying and fragile.
Speech != intelligence, but "Thank you," = humility, in that the yukkuri can recognize when someone is giving up easiness for their easiness.
This Marisa did not deserve the ending she has coming.
I can see that the fact that she's curious can be perceived as, 'annoying,' but the fact that she wants to learn and wants to be with anon means she's a nicehead.