Cid (Final Fantasy) Images

Cid (シド, Shido?) is a character that has appeared, or at least been mentioned, in all Final Fantasy-related media; the main series, spinoffs, film and anime, with the only exception being Final Fantasy XII: Revenant Wings.

Cid has become somewhat of a Final Fantasy trademark, as with chocobos and moogles. He leads the list of recurring characters. However, each installment features a different Cid character, and his roles in the series also range widely.

He often supports the player as NPC or even a party member. But you also see him on the opposing side or acting as an antagonist in some games.

Source: Final Fantasy wiki