Final Fantasy Lost Stranger Graphic Novel Volume 10

To bring back his younger sister, Yuko, Shogo and the others continue their search for "Raise" and head for the Gold Saucer, a commercial hub overflowing with avarice and machina. They reunite with Randolph, with whom they fought the Mist Dragon, but upon seeing him, Cid gets enraged and challenges him to a battle! What sort of grudge is Cid harboring...?