Who is Susie Buffett from Buffett: The Making of an American Capitalist and what is their importance?

Susie Buffett grew up in Omaha, daughter of a minister and psychology professor. Her parents were friends of Warren's parents, and she roomed with his sister at Northwestern. She was an outgoing young lady who, having spent a sickly childhood, was so enamored with her healthy life that she loved life to its fullest, and reached out to others. Having no fear of death, she often spent time with those who were dying, the complete antithesis of Warren Buffett who feared death and would not approach the subject. They dated once or twice, but Susie was in love with another man, to whom her parents objected because he was Jewish. Her parents approved of and liked Buffett who spent many evenings in their home, and so, eventually, she gave in and allowed Warren to "court" her.