Let's see...  Potential domains for worshiping Torahime...  Based on what I remember from building Alactra, I believe the four personal Archfiend domains are in addition to whatever alignment-based domains we get, right?  Archfiends don't actually grant spells, but they do act as intermediaries, proxies for more abstract sources of divine power, like the lower planes themselves, and also patrons for priests who worship a particular abstract belief or ideal that meshes with the Archfiend's own philosophy.  The Book of Vile Darkness also says they can act as patrons for priests of evil gods, but I imagine our characters probably won't want to get involved with evil deities just yet.<br/><br/>Thus, Alactra draws her divine powers directly from the Abyss, but uses Vholdran as a focus, while Torahime would be more likely to take on followers of a particular abstract belief or ideal, that being a belief in gaining strength through rigorous discipline and training (without particularly caring for what good or terrible things they do with that strength once they've acquired it).  So for her, possible options could be...<br/><br/>Celerity (obvious, given her focus on speed)<br/>Mind (training the mind as well as the body)<br/>Strength (training the body as well as the mind)<br/>War (and again rather obvious, granting her priests proficiency and weapon focus with the katana)<br/><br/>And... I suppose that's about it, actually.  That was a bit easier than I was expecting. ;D