Who is Sunrise from Ride the Wind: The Story of Cynthia Ann Parker and the Last Days of the Comanche and what is their importance?

Sunrise (Tabbenoca) is Naduah's Indian father. He makes an agreement with Wanderer from the time that Cynthia Ann is taken captive to raise her to be Wanderer's future wife. Sunrise loves Naduah like a daughter, and he teaches her to take care of herself.