Buchi, who can only speak Cat-English (much to Mike's distress). "Where is my home?" To top it off, he belongs to Kate.
The golden scene in the art supplies store, where Kate is trying to help a boy find a birthday present for his little sister. Her totally unhelpful listings of various kinds of paint, ending with her friend Sora—which she does twice—are a hoot.
The cats have some great moments too, but what tops even Buchi's first scene is the last plan of trying to get Kuma a home. The many suggestions of what to write on the box (including Grey's, which just says "Meow") is hilarious.