Casati was born Luisa Adele Rosa Maria Amman on January 23, 1881
Determined to become a “living work of art”, she lived her life as a reaction to her horror of the mundane, crafting herself into an otherworldly creature whose image was her voice.

An outsized personality, hers was a life lived in performance.

She was in herself and in her creations an unforgettable spectacle, and although by the time of her demise she had ceased to live a gilded existence, her legacy was not about to fade away

But life as performance seems to bear the ingredients of tragedy. As described by Jean Cocteau,
As soon as she came out of her dressing room, the Marquise Casati received the applause usually given to a famous tragedian at her entry to the stage. It remained to act the play. There was none. This was her tragedy.
Is it the common choice of those who don’t feel that they belong or are seen (or feel themselves to be) as inadequate to choose being the performance of self over being oneself?

Age cannot wither her, nor custom stale her infinite variety
William Shakespeare
Anthony and Cleopatra
References
An Ode to the Singular Marchesa Luisa Casati
Anarchists of Style: Marchesa Luisa Casati
Marchesa Casati Goth, Glamorous and Wild
http://www.vogue.com/fashion-shows/spring-1998-couture/christian-dior