Who is Hassan?

Amir's most loyal and devoted servant, who is born with a clept lip. He and Amir were nursed by the same woman and, unbeknownst to them both, they are half-brothers. Hassan is illiterate but smart and stands up for others. He is also the best kite runner in Kabul. He dies at the hands of the Taliban, defending Baba's house from takeover. He has a cleft lip. A cleft lip is a congenital split in the upper lip on one or both sides of the center, often associated with a cleft palate.