Miss Monday
Miss Monday was paired with Igaram (Mr. 8) as his partner during his time working undercover in Baroque Works. Beyond that, there's not much public information about her—though what stands out immediately is her inhuman strength, which matches her absolutely massive, muscular build.
She fought alongside Mr. 8, Mr. 9, Princess Vivi (who was operating as Miss Wednesday), and the other residents of Whiskey Peak when they all went up against Zoro. Later, when Vivi's cover got blown by Mr. 5 and Miss Valentine, Miss Monday tried to defend her, insisting that Vivi was her friend. She didn't stand a chance against Mr. 5, though, and was taken down.
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