Anna Fonsmark in The Danish Girl

Anna Fonsmark

It's Not Over Until the Person of Unknown Weight and Size Sings

Anna is too busy singing opera to be a major character, but she appears at two critical moments in Lili's life—her "birth" and her death. It's her dress Einar tries on, inspiring Lili's creation, and Anna visits Lili in the hospital as she is dying, and takes her on her final walk outside.

In between, we rarely see Anna, and we know next to nothing about her, other than she sings opera. But in her couple of scenes, Anna is a very minor character with a very major influence on the story.