SpoilerThis is based on my characters ancestor who founded the shrine. Her name was Imari, her later families' name. She fought like described above in a monk-wise fashion. During her training on the grounds where in many years their shrine would stand a massive battle had taken place, and without knowledge (as described rare, but possible, in the monk storyline), she was able to open her first chakra. She was of course startled and confused by the sudden rush of power.

She found out about only the scale of the battlefield that had spanned the area where she had trained, and believed that ones' strength with the gods would grow stronger if they trained on such grounds, or, by defeating incredible foes. She went on a long journey, to find more such places, and testing her might against others, growing more ruthless as years went by, as her challenges for merely testing strength devolved into a fight for survival, where the defeated had to perish.

Once she had grown old, she settled down back in the small village next to the old field where she had first obtained this greater strength, unable to proceed further down this path however, despite the years of searching. She found a husband and had a daughter and passed down her story and experiences. She passed on a soul crystal to her before passing away.
Out of shame for the many vile things her mother had commited through her life, her daughter sealed the crystal away below the shrine and tried to honor her mother's good by continuing the first part of her path. She staid in the shrine and meditated and trained like her mother, but honored to never use her strength against humans unless to protect another.

The crystal remained with the other relics below the shrine, imbued only with the first Imari's memory, awaiting another shrine maiden of the Imari family to attain she same feat. As would happen, many generations later with my character. 

So in short a shrine maiden who by accident opened her first chakra, and who due to cultural differences and beliefs uses the same source of power in a different style (I envisioned that she would rather manipulate her aether into something sliiightly exterior to allow for a fighting style surrounding slashes instead of punches as the strength unleashed with punching would be destructive to her body (such as breaking her hand or lower arm trying to punch through someone in full armor as she is physically meek, sort of as a more literal and reworked fists of fire (spirit claws basically)))