This was Jahan's sister, Lise.

A score of years younger than himself, she was but sixteen, and had been living alone with him since their father's death.

Very slight and delicate looking, she had a most gentle face, with fine light hair which suggested pale gold-dust.
She was almost a cripple, with legs so weak that she only walked with difficulty, and her mind also was belated, still full of childish _naivete_.

At first this had much saddened her brother, but with time he had grown accustomed to her innocence and languor.

Busy as he always was, ever in a transport, overflowing with new plans, he somewhat neglected her by force of circumstances, letting her live beside him much as she listed.
Pierre had noticed, however, the sisterly impulsiveness with which she had greeted Antoine.