I don't know that there was any specific archetype that truly inspired me when I began writing Briana, but one of the ideas I've sort of always kept in the back of my mind was, 'what if Leia had never been separated from Luke, and became a Jedi instead?', thrown in with a heavy dose of brat, family drama, and entitlement that's had to be worked out of her.
I also tend to go more with Luke's ideal of what a Jedi is in the old EU, rather than the pious monks that adhere to a very strict Jedi Code, like what we are shown in the Clone Wars. Luke's NJO was what originally inspired me and made me interested in Star Wars, so that's what I tend to default to. Plus, I overall feel like it was a more balanced approach/take on the Jedi.
A lot of my original ideas with Briana have changed, however. Including her leaving the Jedi Order altogether after becoming disillusioned by it, abandoning her family, killing her father (this was on the table for a long time) and going on an almost Ahsoka-like arc. Instead, she ended up being influenced by a lot of other writers characters who have either mentored her, befriended her, or whom she's had to teach - which has taken the natural progression of her story in an entirely unplanned direction, developing her into a stable/responsible and even more committed woman. Not only to the Jedi, but also to her family and loved ones.