Tattoo script alphabet letters. The world of spira uses three different alphabets which work like codes for the real world latin alphabet. A cross is a geometrical figure consisting of two intersecting lines or bars usually perpendicular to each other. Tidus also has weapons with the text guardian inscribed on them in spiran script. Most signs in the game are in spiran alphabet as is the writing in blitzball teams logos and the text nog on aurons keg.
A cross of oblique lines in the shape of the latin letter x is also termed a saltire in heraldic terminology.