I had a really hard time with this one. Mainly because Kunemon doesn't have eyes in the tradional sense, and can't express using his mouth; he's covered in a hard shell, so there's not much he can move to express himself. I use his ears a lot in trying to express him. And his claws and posture.
From left to right, starting at the top, the poses are this: (top row) Scared, (middle row) Attacking, Sad, Worried, Sonar, and (third row) normal.
"Sonar" isn't really a good description of the last in the second row. Because Kunemon has no eyes, I figure he's blind, and I decided that he uses a mix of heat sensors and echolocation to detect where things are, with hearing secondary.