The body of Celine Dookhran, 19, was found stuffed in a fridge with her throat slit after a second woman who was also attacked raised the alarm from her hospital bed.
The two women were said to have been bound, gagged and kidnapped by masked men on Wednesday. They were taken to a house in Kingston-upon-Thames, south-west London, where they were both raped and Ms Dookhran was killed.
Mujahid Arshid, 33, of no fixed address, appeared before Wimbledon Magistrates' Court on Monday charged with the murder, attempted murder, and two counts of rape and kidnap.
He appeared alongside Vincent Tappu, 28, of Acton, west London, who stands charged with kidnapping both women.
Prosecutor Binita Roscoe told the court the teenager was of Indian Muslim heritage and had started a relationship with an Arab Muslim man, The Times reported.
Ms Dookhran's final post on Twitter, on July 11, read: "Alhamdulilah [praise God] for everything that's all I can say."
Her 3,445 tweets also contained posts about make-up, work, looking after her brothers, and fasting during Ramadan.
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