Checkers is Ryoga's pet dog. Ryoga stays away from home so much that he never realised Checkers was pregnant until she had puppies. So far, Checkers is the only member of the Hibiki clan not to show signs of being "navigationaly challenged". Irnoicly, she always knows her master, even when disguised as a pig...
In the world of Yoikko, Checkers is taken care of by Yoikko, since Yoikko is too terified to leave her house in the event of getting lost like the rest of her family.