Season 4, Episode 06 – “Fu Furious”
After a visit from Master Fu, Marinette is confronted by Su-Han, a “celestial guardian” of the Miraculouses who does not believe she and Cat Noir can protect Paris.
When Cat Noir refuses to relinquish his Miraculous, the two fight Su-Han and escape with the Miracle Box.
Su-Han attacks Master Fu and steals his cane to pursue the heroes, and the confrontation agitates Fu enough for Shadow Moth to akumatize him into “Furious Fu”, a painter whose Chinese paper talismans can bring any concept to life.
Ladybug and Cat Noir defeat Furious Fu, impressing Su-Han enough to convince him to approve of Marinette’s continued service as Ladybug.