William has lop ears and a short tail. He has long, golden fur and sky blue eyes. He wears a blue Royal Guard collar with dark blue paw prints on it.
Depiction in the series
Little is known about William's backstory, but it is known that he became a Royal Guard prior to the events of the series.
He is responsible, loyal, practical, intelligent, courageous, elegant, and well-mannered. He gets along well with the other Royal Guards and would do anything for them and the citizens of the Pocket Kingdom.