The G-Meister
Giga Slime
I know we're playing in the year 1098 or something, but we have magic, uber-powerful historic artifacts and FFing gigantic slimes... a bit of extra in-game character re-customisation wouldn't be that too far fetched? Maybe Francisco gets an upgraded stall after you beat GUN-D4M, or he moves into one of the houses and therefore can expand his range of kit?