Griffin Turner's Grandfather

The past Elemental Master of Speed is an unnamed character mentioned by Sensei Garmadon in the first episode of Season 4: The Tournament of Elements. He was never depicted in the show, but only mentioned by Garmadon that he is Griffin Turner's grandfather.

History
Not much is known about the Past Master of Speed except for the fact that he must have known Garmadon some time before his transformation to evil.

The Invitation
In this episode he is merely alluded to by Garmadon to the Ninja while introducing the Elemental Masters.