Shirley is a small green Chihuahua with purple eyelids, long eyelashes tipped with small gold balls, a purple nose and black paws. She has heterochromia, her right eye has an orange iris and the left one has green and orange coloring. She wears a large golden earring on her right ear. Her attire consists of a green dress covered by a purple cape and a blue hood her and Courage bickers  a lot but they deeply care for each other though and they are somewhat lovers they flirt a lot but not official