Beyond fulfilling his purpose, I believe Caine truly enjoys his art and dreams of sharing it like real humans do, receiving good feedback, and feeling that his happiness from creating art brings others no less joy. And now that we've become even more convinced that Caine truly listens to people (he showed his thousands of eyes to Pomi not without a reason; the problem is, he understands everything in his own way), I believe that Caine, knowing Zooble's love for art and how they support Gangle in this, wanted to cheer them up by sharing his drawing, which he's sincerely proud of! On the one hand, this is a desire to receive praise, and on the other, the hope of creating a connection based on a common interest