Franca had already concealed herself by the time she recognized Perle. Her plan was to circle around and use the mirror to reflect Perle's figure, hoping to curse her.
If the curse failed, it would at least create an opening for Jenna to sneak up from the shadows and assassinate the target.
Though not as cunning as Lumian the Conspirer, both Jenna and Franca instinctively sensed that the sudden assaulting Perle was incredibly dangerous, even more so than Moran Avigny. However, they didn't go so far as to suspect her of being an Overseer or demigod.
As Perle uttered the Words of Order, Franca felt slender, snake-like entities emerge from the surrounding shadows, enveloping her despite her invisibility.
Swoosh! Swoosh! Swoosh! Razor-sharp icicles burst from the ground like soldiers thrusting their spears.
Franca quickly leaped up, pressing one hand against an icicle to tumble out of the area.