She and her family spelled her nickname "Sisi", not "Sissi" like in the eponymous popular movie trilogy.
She had a tattoo of an anchor on her neck.
Her favorite treat was violet sorbet.
In contrast to other women of her time, she rejected the use of heavy make-up and perfumes, as she wished to showcase her natural beauty. Only her hair was being sprayed with fragrance essences.
Even after four pregnancies she maintained her weight at approximately 50 kg (110 pounds, 7 st 12 lbs) for the rest of her life. She achieved this through fasting and exercise, such as gymnastics and riding.
She wrote poetry inspired by Heinrich Heine.
She was interested in history, philosophy, and literature, and developed a profound reverence for the German lyric poet and radical political thinker, Heinrich Heine, whose letters she collected.
She spoke fluent German, English and French and also studied Hungarian and modern Greek.
Her hair was being washed about every three weeks with ever-changing essences, preferably cognac and egg. The procedure most times took an entire day.
Her personal hair dresser Fanny (Franziska) Angerer was previously a hair stylist for actresses working at the Burgtheater in Vienna who also invented new hairdos based on her own ideas before Elisabeth wooed her away.