To be fair Gecko, while Fran opened up the idea of Miyu working alongside her and Henry, Fran doesn't trust Miyu either. Traitor or not, she's certainly a wild card who's undergone some sort of change nearly every time she's seen on the battlefield, and even her appearance at KR is strange simply because all she did was loot some unspecified stuff and bailed. And Fran isn't the sharpest axe in the armory, but even she thinks something is up with Miyu, and while she doesn't know what it is, she'll keep Miyu on close watch and try to figure out what's really going down.