Mr. 13

Miss Friday is paired with Mr.13, better known together as the unluckies. She is a Vulture bird

The Unluckies are two agents of Baroque Works. They consist of an otter named Mr. 13 and a vulture named Miss Friday. The Unluckies serve as messengers for Mr. 0 (Sir Crocodile), and are also in charge of executing any Baroque Works agents that fail their missions. Also, Mr. 13 is a skilled artist & was able to draw up posters of Nami, Zoro, & Luffy to report to Mr. 0 that they'd learned of his secret identity. The name the Unluckies comes from the superstition of Friday the 13th being an unlucky day for people, as well as the unfortunate fate of those they come to visit.

The Unluckies appear during the Whiskey Peak arc and are later seen in the Little Garden Arc when they are sent to check up on Mr. 3 and Miss Goldenweek. Instead they encounter Sanji who is answering a phone call from Mr. 0.

They attempt to assassinate Sanji but fail miserably. Though the two were thought to be dead (Sanji twisted Miss Friday's neck until it snapped and Mr. 13 was kicked into the side of Mr. 3's wax house so hard it left an imprint), it has recently been revealed in the "Meet Baroque" mini-arc that the Unluckies survived their encounter with Sanji and were used by the Marines to make drawings of the Baroque Works agents that were not captured in Alabasta. However, it is unknown what was done with them afterwards.

When the two tried to assassinate Sanji, it was revealed that that in combat, Miss Friday has a pair of machine guns strapped on her back, and Mr. 13 has a pair of shell gloves with short but very sharp claws on the fingers.