Beautiful But Demonic (Credence Barebone x reader/ Fantastic beasts.)

Y/n was a Perfect and quite intelligent witch until they met, and fell in love with Credence Barebone which was hightly illegal in the wizarding world, since Credence was a "muggle."

About Credence:
He was thought to be a muggle or what some people call a Non-mag but he wasn't, he was something else...something sinister.

He was a young boy who was abandoned by his father. He was adopted by Mary Lou Barebone, the leader of a No-Maj anti-witchcraft group called the New Salem Philanthropic Society.
but their plan didn't work, Credence actually grew up loving magic.

One day he met a Gellert Grindelwald disguised as Lord Percival Graves in an ally way, promising him magic and wealth only if he killed Albus Dumbledore....

The very sweet but demonic boy met Y/n at the entrance of the Bank, where they were listening to the anti-magic speech, about the burden of having witches in new York.