The Maledictus
Nagini was originally a female human Maledictus, with the ability to transform into a snake. By 1927, she was a featured attraction in the Circus Arcanus, a wizarding circus owned by Skender (who claimed to have found her in the 'jungles of Indonesia').
At some point, she befriended the Obscurial Credence Barebone, who travelled to Europe with the circus after surviving MACUSA's attempt to destroy him in New York after he attacked the city in December 1926. The two became close friends and even
超自然
female
snake
cursed
friend
circus