Musashi:
I'm just trying to get a better feel for how the Daidoji Family is generally viewed (both OOC & IC).
I certainly don't want to claim to be 100% right on this. By their very nature, the Daidoji are not an easily known family. And especially with things like this, it's a matter of subjective interpretation.
We know the Daidoji have no qualms about seedy business to collect sensitive information. In my mind, that doesn't extend to actually fabricating and/or planting fake info, but it's a thin line. I fully expect opinions to differ, if not on this then probably on other stuff.
That said, to me that's half the fun: not all Daidoji are completely the same, and that goes for every other family out there too - if that wasn't the case, there'd be no interest in roleplaying.
Daidoji Sakura:
I exaggerated a bit there, but Sakura is known for (e.g.) going into the "bad" parts of town, seducing (light, not "adult forum" stuff) an enemy, and consorting with dishonorable types to get necessary information.
In other words, if Yoshida is the "only on the battlefield" type of Daidoji gender probably won't make a difference to Sakura. She won't argue about it, she'll just do it.
The gender issue is mostly to do with plausibility. If the majority of people involved (and particularly our GM) feel that a male yojimbo for a female courtier or shugenja is improbable, impractical or both and there's no objection from the courtier/shugenja player to have a PC yojimbo rather than an NPC, that's really all the reason I need. Any in-character headbutting and arguing as the result of such a relationship is just part of the roleplaying (not to worry, Yoshida knows full well who has the final say in any difference of opinion between a yojimbo and his charge).
Maybe the example you chose (planting false evidence) is not the most representative for this issue though. It's just over the line, while doing unsavoury things to gather info which can then be used against a political opponent is close to but not over the line (again: to me, or at least to Yoshida. Not every player and certainly not every Daidoji will make the same distinction). All in all, it's difficult to get something subjective like this across in a few short sentences. We could probably go over it for days.
Daidoji Sakura:
Also of note is that I'm a very intuitive player, so sometimes I'll do things that just won't make any sense. I'm not always right, by any means, but I play my hunches. So sometimes she'll go to the "bad part of town" because of a hunch and nothing more ...
That makes sense. If it worked once, it's worth trying again.