Sonorous volonté- MLB Princess Justice Au

The ladybug miraculous was lost in the initial destruction of the temple, for years Chat Noir, Rena Rouge and Viperion served as the guardians of Paris against Hawkmoth and his allies.

Until Rena Rouge was murdered infront of all of Paris, the damage was felt everywhere from that incident from civilians to heroes alike as two years later he returns with a threat. Chat Noir promises Suhan to retrieve the stolen miraculous while promising himself to avenge everyone who suffered because of his mistakes.

It's the final year of high school when two new villains appear to fight alongside hawkmoth who now calls himself monarch Argos with questionable motives and with a personal vendetta against monarch,and the cunning, minacious Princess Justice who seems to have a personal killing target on Chat Noir who hates her.

Around mysterious girl who is interning at his father's company transfers into his class, Adrien is intrigued by her mysterious demeanor unbeknownst to him that girl hides behind her mask a dangerous secret.

Who is this girl and what's her story?

Reverse crush au
Alternate universe - there is no Ladybug, the Ladybug miraculous was lost along with the butterfly and peacock but it was damaged even prior to Fu's birth. More details about this au in my tumblr.
But Marinette is not the Marinette we know.