Steve

Steve is a cat belonging to the Matsuoka family.

Appearance
Steve is a chubby house cat with green eyes; partially white face; white chest, paws, belly and whiskers; and black coat that runs halfway down the top of his body horizontally (from face to stubby tail).

Summary
While Rin Matsuoka tries to be friendly with him, Steve is uninterested in his attentions. It is unknown how the family came to own him, how his name was chosen, how his tail came to be short, or how old he is; but he appears to be well-cared for.

Based on his shortened tail and coat pattern, it's possible he's a Japanese bobtail; a common breed native to Japan.