"It was a shame she never seemed to run into enemy armies when she didn't have important duties to carry out. " This quote just sums up Tazendra pretty damn well.

...wow, Tazendra. /snrk
What book series is she from again?

The Dragaera books by Steven Brust (specifically the Khaavren Romances, not the Vlad Taltos series)

Huh. Mayhaps I'll keep an eye open.
...I mean, I'm trying not to buy more books, but if I happened to see one

First one is The Phoenix Guards. Supposedly it was brainstormed when the author wondered what would The Three Musketeers would look like in the Dragaera setting.

Noted.