Question

Important character sketch of the noble the story of my life which may come in board exam

Answer 1

First of all go for the main characters...
HELEN
MISS SULLIVAN
AURTHUR H. KELLER (Helen's father)
ALEXANDER GRAHAM BELL

Then for further preparation....
BISHOP BROOKS
HELLEN'S MOTHER -KATE ADAMS
MILDRED
MR. ENDICOTT
MR. ANAGNOS( not v. imp. )