She even claimed the couple's daughter was possessed by the devil.

她甚至声称这对夫妇的女儿被魔鬼附体了。

《柯林斯英汉双解大词典》

She wanted to live onshore and find love so bad that she made a "deal" with a "devil" and "sells" her beautiful voice, or "soul" so to speak.

她想到岸上生活，并渴望寻找真爱，于是她和一个“魔鬼”做了一笔“交易”，“出卖”了自己美妙的声音，或者干脆说就是“灵魂”。

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She has convinced herself that she is possessed by the devil.

她确信自己被魔鬼附了身。

《牛津词典》

During the trials, Ms. Knox became a highly divisive figure, depicted as a cunning she-devil in Italy and a victim of a ham-handed Italian justice system in the U.S. Critics charged that the case was based mostly on circumstantial evidence.

WSJ: Italy's High Court Overturns Knox Acquittal

This is the same girl that used to make fun of Sex Devil but she doesn't know it is the same person because he talks completely different.

NPR: Excerpt: 'The Mysterious Secret of the Valuable Treasure'

In the older film, the 12-year-old Regan starts acting up because, well, she's possessed by the devil, but also because her parents have just divorced and she now lives with her single mom, a working actress, and you know how that goes.

FORBES: Magazine Article