Her attitude and body language would mesh pretty well with a geisha archetype when it comes to dresses, for example she could wear a short yukata.
Additionally, the Bloodmoon skin line is highly inspired by japanese monsters and ghosts (yokai and yurei).
No idea if you know it, but there is a legend in japan about the kuchisake-onna.
This ghost is usually hiding her face with a cloth mask (nice parallel to the Bloodmoon masks), because her mouth is slit wide open underneath.
I would just change it to give the mask a stilistic slit open mouth instead, game for 12 yo and stuff.
Nowadays, the kuchisake-onna is also usually pictured with scissors. Which would work great for Camille, you could make her legs each one half of a scissor.
In that skin line, Camille would probably fit in the demon trope (like Talon) or the priestess trope (like Elise). Meaning that she is either fully possessed by that ancient ghost or just sharing her body with it. I don't see a reason why she wouldn't fit into the organisation when it comes to lore.