Some people pause to watch; school parties giggle; the dancer is an importuning wraith trapped in the architecture.
On my way out I find an information sheet. The inspiration is not Japanese after all.
Marie-Louise Crawley is performing the dance/mime she choreographed in 15-minute segments, Likely Terpsichore? (Fragments).
The title is based on the museum's Roman marble statue of a seated woman minus head, arms and harp who might represent Terpsichore, the Greek muse of dance.
Marie-Louise depicts women from Ovid's Metamorphoses: Myrrha, Philomela, Medusa, and Pygmalion's nameless marble statue who comes to life and, in later versions of the story, is called Galatea.