Question: is kovu older than kiara?
Answer: Kovu was born during Scar's reign, and Kiara and Kion weren't born until some months after Scar's defeat and the banishment of Zira and her family. By the time Kiara and Kovu met, Kiara was a month old, meanwhile Kion was on his way, and Kovu was three to four months older than Kiara at the time.