Answer:
Due to influential personality.
Step-by-step explanation:
Prithvi Narayan Shah was appointed the person favored by the people as kaji because he was the one of the most influential personality in the state. Kaji is a respectful title and position used by Nepalese nobility which was given to the person or individual on the basis of its achievements and sacrifices for the country or kingdom. Prithvi Narayan Shah was the most favourite personality among the people of Nepalese for its achievement so that's why he was appointed as kaji.