AFAIK, nobody knows why exactly, they just do this thing, that in each game there’s a character named Cid who is (most of the time) related to tech in some way. Same for Biggs and Wedge - they aren’t in each game, but they always come in pair. When there’s Biggs - there’s always Wedge. They could do completely random roles, usually not major ones, but it’s just a recurring element
Open world is severely overrated