I've played a few games with Kirai myself, and I must say thanks for your input.
I will agree with the movement shenanigans that she and her crew can pull off. It's not as explicit b/c it's on a few different cards, but it's there.
I tried my first few games without Seishin, figuring I could call them up as other stuff started dying. However, I think she's supposed to be played in the opposite way: having Seishin at the start to fuel evolve spirit and Kirai's other abilities.
In my opinion, Kirai needs some soulstones to work. She will probably be making a few healing/damage prevention flips during the fight, and both Summon Ikiryo and In The Spirit World require an extra suit to cast, and you won't always have the control cards handy.
Lost Love is an amazing totem for Kirai. I haven't used him too much, but even saccing him early b/c Kirai dies isn't a horrible option. Having a spell that can turn any model into a spirit for the encounter is a great ability. For example, the Dead Rider is a great choice... it can heal its own wounds and when you couple its 6/10 with Kirai's movement craziness you can get across the board very quickly.
One important thing to remember with Kirai is the difference between killing and sacrificing. Ikiryo and Lost Love only force you to discard control cards when they are killed, and Ikiryo only gives Wd back to Kirai when she is sacrificed.
Another thought to take with Kirai are The Hanged and Jack Daw. They're spirits, so they don't cost extra with her. Jack gives an extra control card, as well as some unique CC or SS advantages plus some good ranged support. The Hanged have a melee ability or spell (I don't remember which) which causes the defender to get negative twist on all Wp duels for the rest of the game. When coupled with Detsu-ba, Ikiryo or the Onryo, who can force Df instead of Wp, it's pretty powerful, especially with certain schemes.
