In Final Fantasy XIII, Cid isn’t an engineer or a portly headmaster. Cid Reins is a young looking soldier working with Sanctum, the government or the “enemies”. Unless he has a change of heart, Lightning and him are going to clash. Reins or “rain” vs. Lightning, get it?
And here are more screenshots of Hecatoncheir, Vanille’s poly-arm eidolon that transforms into a drivable mech.