Her kit is nutss
S1 : charisma +30% team charge
S2: 20% Targeted charge and NP gain
S3:Targeted 50% arts buff + invuln + power mod for human enemies
NP is deduff cleanse , charisma and special invuln that cannot be bypassed.
Imagine invaliding 3 servants at once, waver tam and Jeanne. Such is the power of saber face.