
Under the code name Miss Monday, this former Baroque Works Frontier Agent partnered with Igaram while he infiltrated the syndicate. A powerhouse brawler and a supporting antagonist during the Whisky Peak Arc, she eventually settled in Whisky Peak and raised a son with Mr. 9.
Tall, dark-skinned, and heavily muscled, Miss Monday keeps her pink hair in short twin-tails. Her short dress carries a magenta-and-white diamond pattern decorated with three green flowers. One of her most striking traits is a soft, high voice of the kind usually linked to small, delicate girls, which proved useful for disguise when she passed as a nun without anyone noticing her true bulk and power. Following the timeskip she wears her hair loose and looks somewhat trimmer, though her frame stays heavily muscled.
Brash and sure of herself, Miss Monday acts on impulse and leans hard on her physical might. Underneath that, she values loyalty and friendship, shown when she put her own life on the line to shield her former comrade Miss Wednesday.
Her strength far outstrips that of an ordinary person, evident in her bulk and in the shock of the Whisky Peak Millions, Mr. 8, Mr. 9, and Miss Wednesday when someone managed to outmuscle her. That power still falls short against opponents like Roronoa Zoro. She fights with her fists or whatever objects are within reach. Her metal sheath worn on the right hand fuels her Kairiki Meriken, a knuckle-loaded punch rendered as Superhuman Brass Knuckles in the VIZ, 4Kids, and Funimation versions. After the timeskip she also carries a musket on her back, though whether she could already use it during Whisky Peak is unclear.

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Miss Monday was knocked out after Zoro overpowered her Superhuman Brass Knuckles attack at Whisky Peak. She later settled down in Whisky Peak, married Mr. 9, and raised a son named Nanday.
In the live-action One Piece adaptation, Miss Monday is played by Chi Mhende.
When Miss Monday grabbed Zoro's neck and landed her Superhuman Brass Knuckles punch, Zoro seized her head, overpowered her, and knocked her out, a defeat that stunned everyone watching.
Yes, Miss Monday and Mr. 9 married and settled in Whisky Peak, where they raised a son together named Nanday.
Miss Monday was a Frontier Agent in Baroque Works who partnered with Igaram while he infiltrated the organization, using the alias "Sister" while working undercover at Whisky Peak.
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