The Menkuu family once belonged to the Hyakubami clan. Their family business was disguise, distinct from the Ogami family's "disguise" and the Warakubami family's "performing arts." They excel at making themselves look like harmless kittens, but when they tear off that disguise and reveal their bloodthirsty, lion-like nature...
This story contains a lot of headcanon. Original-work fans who mind that should read with caution.
Hyakubami: In this story, the clan was originally founded with two ruling families, the Momobami and the Menkuu. The Momobami later supplanted the Menkuu and became the sole dominant family.
Menkuu: Once a ruling family of the Hyakubami, they were powerful and their family business was "disguise." After being supplanted, they left the Hyakubami and have been plotting to return ever since.
The inspiration came from the live-action adaptation. Mary wins her gambles at crucial moments almost every time thanks to her superb acting, which inspired me to come up with this story.
Theme: A comeback from the brink of defeat