Is Hassan a foil character in The Kite Runner?

Hassan is indeed a foil character in The Kite Runner. He is Amir's foil, his qualities of honesty, courageouness and loyalty are prominent. They further highlight Amir's cowardice, his conniving ways, and his need to do whatever it takes to get Baba's affections. Though Amir is the protagonist in this work, and we're supposed to want him to come through victorious, it's hard with a character like Hassan under his wing. Their situations almost make you hate Amir. Without Hassan being so pure, readers might be able to more readily relate to Amir yet his intentions come across as more and more evil. Housseini made a perfect pair, like the Jesus, God's beloved Son and Lucifer, the Angel who fell from His graces.