Guardian (Final Fantasy X)

In Final Fantasy X, a Guardian is a warrior tasked with protecting a summoner during their pilgrimage across Spira to defeat Sin and bring the Calm. Most summoners travelled with one or two Guardians, though some, most notably Yuna, were protected by upwards of six. The earliest known Guardian, as well as the first to defeat Sin, was Lord Zaon, the lone guardian of Lady Yunalesca, the first High Summoner.