I've played quite a few games against Kirai and here's what I've gathered.
Keep Five seishins on her all the time, deploy her totem behind a building or something an keep it there the whole game.
Shikome is a monster, even more so when it is summoned..
picking prey as soon as its summoned, on top of not ever being effected by slow means it will almost certainly kill its prey the turn it comes in.
because you can use nimble to walk, then two actions to charge and the fast action you get against you prey to take a second attack...
All it cost you is two sieshins and four wounds (with her trigger)
All her spirit models are pretty solid, the guy that plays her doesn't take datsu-ba any more, because she just didn't have the same hit as everything else, and didnt work really well with anything.
Couple models we considered adding were Jack Daw and/or the hanged, theyre solid units, but they really shine in a karai list because they are spirits, snow storm might be interesting but I'm not sure how well it will work.
All in all they look pretty fun to play but I'm waiting for Collodi to come out before i start my next army.
Played against Rasputina once and the guy playing her was an ass so I don't really have an opinion on that.
And ophelia is essentially the family in short green form, so if your bored of the guild i wouldn't suggest them
lol