From the same article/spotlight in french, on Yûsuke Mogi. Also you can read there about the idea behind the design of Zenos' enormous sheath.
https://t.co/s0SWiBMMJ2
Initial designs, & a final one for Zenos. 1st one was rejected, due to being too out of step with the spirit of FF, & too mundane for a major antagonist, & 2nd - for being a little too feminine, & for fear it would be difficult to represent in the game.
https://t.co/mJsFZrgGjm