Lin Wen
Lin Wen
Vital statistics
Sex Female
Nationality American
Family Joan Watson (half sister)
Oren Watson (half brother]]
Behind the scenes
Appearances All In
Portrayed by Samantha Quan

Lin Wen is Joan Watson's half sister.

Joan was unaware she had a half sister, until Lin went to her and Sherlock Holmes for help. She initially claimed to be an ex-girlfriend of Mycroft Holmes, but it was revealed that she never knew him and was in fact Joan's half sister.