She is the sister of the main character's best friend, Kuzuhiko.

Ironically, she is the sister of his friend.

Manningham married, about 1607, Ann, sister of his friend Curll.

He would then treat her with cordial respect and disinterest, as befitted the sister of his closest friend.

One of the women in the Citroen was the sister of his friend.

She turned out to be the younger sister of his best friend.

Chandru hesitates to love her, as she is the sister of his close friend.

Maisy 2011-2012 was introduced in the fourth series, being the younger sister of Dani's good friend, Ruby.

She was the sister of his friend, actor Kristian Mantzius.