rogue_crow - A) Yes. B) That depends. Zevran is an accomplished assassin, so he's definitely dangerous...but he's also rather cheerful and laid-back despite that, so he may not actually be intimidating enough. Ultimately your call, I guess?

have_your_lives - A) Yes. B) Yes. Schuldig is a telepath, for one thing; while he's certainly not able to read a rat's mind, he might be able to clue in from Merem himself(unless Merem is exempt from telepathy; Schu has a permission post up about this). For another, he is a vicious sadist with no morals whatsoever and he'd scare the hell out of pretty much anyone.

the_bloody_road - A) Yes. B) Yes. Dias is far nicer than Schuldig, but he's still an accomplished swordsman, and he also has a very low tolerance for bullshit of any kind...not to mention an entire repertoire of angry glares. Though the glares aren't related to any dedication to faith, that plus his own strength and short temper would probably be plenty intimidating.

kleptophile - A) Yes. B) No. Lyn has some powers of his own, but all the actually scary ones are extremely rusty from disuse (not to mention that he doesn't even have any of them back yet) and, personality-wise, he's pretty much like a rat himself. He tries to appear strong and dangerous, and he's usually angry, but I doubt he'd actually scare the King of Rats into revealing anything.