Miss Father's day

Along with Mr. 7, Miss Fathers Day (ミス・ファーザーズデー, Misu Fāzāzu Dē) is part of the "Sniping" pair who apparently are deployed for jobs where sniping is necessary. Miss Fathers Day has a strange sense of fashion involving frogs, and her Gero Gun is shaped like a frog and its bullets are shaped like frogs (Gero is the Japanese word for the sound a frog makes). In the 4kids English dub of the anime, she speaks with a French accent, which has generated some controversy among fans since "frog" is an ethnic slur for a French person.

History
Miss Father's Day shows up in the main story briefly during the climax of the Arabasta Kingdom storyline manning the giant cannon that Baroque Works has placed in the Arabasta capitol of Alubarna. Princess Vivi figures out the location of this cannon and, during the final moments of the battle of Alubarna, she (with the Straw Hat Crew's help) attacks it. Miss Fathers day and Mr. 7 attempt to stop her, but Vivi skillfully evades their gunfire and defeats them using her peacock slashers.