A Britannian aristocrat who holds the noble title of Margrave.
He almost died in the battle against the Black Knights, but was found by Bartley and his body was altered in an experiment. During the Black Rebellion he was thrown into the sea along with C.C., but was rescued by V.V. and the Geass Organization.
After numerous experiments, he obtained the Geass power to cancel the effect of other Geass users, and he was sent to assassinate Lelouch. But he actually went to seek confirmation from Lelouch that Lelouch was fighting to avenge his late mother Marianne. After finding out the truth, Jeremiah changes sides and joins with Lelouch.