What does Tovah from letters from rifka look like?

Tovah has a curved spine and so is considered less "marriageable" than her sister Hannah. However, from the way Rifka writes to Tovah and the stories she remembers about the two of them together, Tovah is an intelligent, generous, and witty friend. Her father is richer than Rifka's, and so Tovah's family does not have as hard a time as Rifka's in Russia.