Firstly, you made a great choice in crews. Kirai is one of the better masters right now. Now to your lists. First things first. You can, but you shouldnt build a list before seeing your strategy. Now Kirai can do a good number of strategies but crew composition varies based on the strategy.
Arguably, the first models that go into Kirai's crew no matter what is 5 Seishin and Lost love. That is the basis on which Kirai can perform the best. Based on what you have now, i would start with the 2 Onryo on the table. Keep your stuff a little close together so you can get maximum yield from your dying spirits to create more spirits.
Kirai however has a HUGE selection of models that she can use and in most cases needs to the side of the table. Shikome, Gaki (which you have), and more Onryo. One can never have too many onryo :1_Happy_Puppet1: As you expand your crew, you should look at Night Terrors, Drowned, NecroPunks, Izamu, Toshiro, Yin, Ashigaru, and CrookedMen.
Play alot of games with her, shes got a lot of tricks and is a ton of fun. hope this helped.