I feel like Hope's only purpose is for Datu. He has been all sad for a while, and his character has lost his importance. But giving him Hope gives him a reason to live again. Someone to love and care for as a daughter. Someone to replace his mostly likely dead family. And I think out of all the people in the tower he is the most likely to be able to learn to fly a chopper. So with this new hope in his life (Ha, pun), he'll be more motivated to fly and protect Hope.
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