Regarding Miri
These are her stats:
Mirri Class Skills
Deadly Assassin
Living Shade
Soul Thief
DEADLY ASSASSIN!! SOUL THIEF!!
Yet she goes nuts if I take her into the Dark Brotherhood Sanctuary; loose status if I use the Blade of Woe; but no problem if I/we sneak up and use any other backstabbing attacks / surprise attacks. Did the developers have a massive brain hiccup? Otherwise this companion sounds like the one for the assassins.
Of course the developers penalty for using the Blade of Woe is 5 degrees off the bubble (pretty much of a D**** Fer Move in the first place).