Muviro is a warrior from the Waziri tribe. He is hostile to outsiders (especially Tarzan and his allies), and has been envious of Basuli for achieving everything he himself could not. When Tarzan accompanies Basuli on his quest to retrieve an eagle's feather before sundown, the two encounter hindrances along the way. A tree falls into the river they are crossing, a stampede of rhinos chases them, and a rock slide starts as the they enter a boneyard. Tarzan spots Muviro just as he is about to push another rock off the mountainside, and wrestles with him. When Basuli demands an explanation, Muviro confesses his jealousy and reveals his plot to claim Basuli's place as chieftain. Tarzan and Basuli find out Muviro is the one responsible for the incidents they encountered. Basuli fights Muviro one on one and both go over the edge of a cliff. Muviro's grasp slips, but Tarzan swoops down and saves him before he plummets to certain doom. Basuli exiles Muviro from the tribe for his treacherous actions - a fate worse than death.
"For my whole life, I have lived in your shadow. You trained to become chief."
"You were betrothed to the most beautiful girl."
"But that stops now!"
"When you fail to claim the feather, I will claim your place!"