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

Placido was the warring Indian enemy who killed Eagle. After Wanderer took retribution on Placido's family, Placido swore revenge. Placido and Wanderer kill each other in their final confrontation after Naduah's capture and ultimate return to white civilization.