Same, though I don't think she was big on techno gear and martial arts?

THOUGH I could be wrong? https://www.amazon.com/Brother-Shadows-Andre-Norton/dp/B000LVNF50 has a review: https://www.amazon.com/gp/customer-reviews/R1Z8M9NA6J83J7/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B000LVNF50
"The protagonist in this stand-alone story is a young outsider trained to be a ninja-like warrior-for-hire"

Another review mentions the book has "one of Norton's interesting little telepathic animals, Yan the Jat."

So it might be worth digging up? It's a 1995 book, though, so it might not be old enough. Still, browsing Norton might be fruitful there.