The character you are referring to is Jem Finch. In Harper Lee's novel "To Kill a Mockingbird," Jem is Scout Finch's older brother and he breaks his arm when he is nearly 13 years old.
Dill Harris
Caroline Fisher
Atticus Finch
Calpurnia
Scout Finch
Jem Finch
Alexandra Hancock
Maudie Atkinson
Walter Cunningham
Boo Radley
Burris Ewell
Jack Finch
narrators brother,broke his arm when he was nearly 13
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