Say Arthur and Yuuna get thrown in a pit. they're both pretty gutless and have a comic flare for stupidity and ridicule... If they were pitted against each other, who do you think would win? My vote's on Arthur. After watching episode 23 and how forceful he was with firing the main cannon, i'd say he can be pretty forceful when necessary.... but that's a far cry from his more perminent role as lacky and cookie-tosser.
To Yuuna's credit, he is a good manipulator and likes to harp on young insecure little girls. In this case, he might succeed in ruining Arthur. well, what do you all say? My vote's for Arthur.