Credence is a wizard who lived in the twentieth century. He is the troubled adopted son of Mary Lou, who is a fanatic anti-witchcraft activist. His biological mother was a witch. Mary Lou hated him due to his magical family origin, but kept on using him.
His full name is Credence Barebone and he is an older adopted child of May Lou Barebone. The foster mother is a relative of the nomaj named Bartholomew Barebone who lived in 18th century and caused one of the biggest dangers against international magic community by revealing secret information about Ilvermorny School of Witchcraft and Wizardry (please see Violation of Warlock’s Statute of Secrecy).
The character seems introverted, extremely shy and more vulnerable than his two sisters, Chastity and Modesty, and is totally defenseless against the abuses of his mother, which occur at the slightest violation of her rules. Credence and Modesty were close to each other. Something that should also make you suspicious is his being manipulated by Percival Graves (Colin Farrell), a powerful auror.
In the picture above, you see Credence and Graves appear in an alley with posters of the new philanthropic society of Salem stuck on the walls. This is a radical organization led by Credence’s foster mother. Salem group wants to expose witches and bring back the Salem witch trials.
Ezra Miller, meanwhile, has revealed that he played the Credence role without knowing almost anything about him. Will he be a key player in future episodes? Unconfirmed rumors say that Credence will soon prove to be a significant character in the Harry Potter universe.