They have their differences: biological makeup, birth family circumstances, personality, needs.
They have their strong qualities: One is more academic, one is more artistic; one is more introspective, one is naturally funnier. They have their weaknesses, too. Very different.
Yet sisters, nonetheless. They have a deep and abiding love for one another that goes down to the soul. Younger Daughter would hear nothing of staying in bed when we went to the airport yesterday morning to deliver Older Daughter.