"I-I never said I wanted to come with you!" His face is almost as red as his hair, yet despite his defensive response his ears are perked high.

You can read him pretty well when he's like this. Normally he gives casual replies and indifferent looks, but if he really wants to be near you, he's as obvious as the sun.

He keeps standing beside you, a pout on his face as he looks away. His tail is swaying happily behind him.