This one is a given because I can't think of another character that makes me laugh so hard all the time. Loyal and loving. Sweet and playful. And extremely dedicated to Ryoma.
Kalpin cracks me up. I just love him. I think one of my favorite moments is when Ryoma is packing to go to one of the training camps and not really paying attention to what he's doing and Kalpin is pawing at the tennis bag. Ryoma zipped it up and all of a sudden it started nyaing and jumping around. He kinda packed the cat.
what made it the best part was that I had just said, "Ryoma, be careful or you'll pack the cat."
My cats totally do that all the time too. They love open suitcases and bags.