Auron is a playable character in Final Fantasy X. He was a warrior monk of Yevon who became High Summoner Braska’s Guardian, together with Jecht. After helping Braska defeat Sin, he promised Jecht to take care of Tidus, his son, and watch over him.
His sword, though called a katana, actually appears to more closely resemble a nodachi or even the fictional Zanbatou. On his right hip, he carries a jug with the word “Nog” written on it (in Spiran script), a term used to describe a number of beverages including rum. The drink is featured in two of his Overdrives: the contents being spat onto his sword prior to executing Banishing Blade, or used to ignite the Tornado attack. The former likely pays homage to Japanese samurai, who would occasionally spit sake on their blades in order to “feed the spirit of the blade.” Source