On May 30th 1980, Siouxsie and the Banshees released “Christine”, as the second single from the album “Kaleidoscope”.
The album itself heralded the arrival of Banshees 2.0, with former Magazine guitarist John McGeoch, and drummer Budgie joining the permanent line-up.
“Christine” the song, was based on the story of Chris Costner Sizemore, an American woman who struggled with what was then know as Multiple Personality Disorder. Her case was depicted in the 1957 film “The Three Faces of Eve”, under a pseudonym, although by the 1970s she had gone public with her true identity. The screenplay was partly written by Chris’s psychiatrists, who refer to these various “faces”, by the names suggested by her different personalities, as they presented themselves. “Strawberry Girl” and “Banana Split Lady” were just two, and the doctors considered Chris to have not just “Three Faces” as the film suggested, but approximately 20.
Just guessing, but maybe as The Banshees matured and continued writing and recording songs which both lyrically and musically took them further away from their punk roots, and into the mainstream, the subject of their own identity might just have come up.