Mr. D

Mr. D is treated as the most divine and supreme being of all in the entire multiverse. He takes on the mortal form of a male teacher in BIBA, however, little is known about the origins of D and his true form. D's previous mortal bodies and identities are also unknown to mankind. The Book of D, also known as the Deist Bible, is an attempt made by his loyal followers and Deists to record and pass on D's teachings and encounters for the posterity.

During D's time in China, Francis Yee has always been his best friend and apprentice.