So, the feminine cast for this ATROCITY OF AN IDEA.

Airi Chen / Me ~ (Face Claim Tzuyu Of Twice.)

Nicknames ~ Ari, Aria, Riri, Channie, Chanel, Airi, A, Ai, and Ari Chen.

Info : Ari is a femora with a sarcastic, bright, and hotheaded personality. She tends to be passionate about her interests and hobbies. As she gets dragged into the world of One Piece, Sabo Outlook is the one that catches her eye. 

Garam Kim / Thebluebeardswife16 (Face Claim As Garam Kim)

Nicknames - Jelly Girl, Kimmy, Rami, and Bunny Child.

Garam is a calm and friendly feminine who was a former member of Le Sserafim, being kicked out due to her scandal. She now works in the performing arts and loves watching Death Note. As she gets dragged into the One Piece universe with Airi, her eyes land on Trafalgar D. Water Law and Sanji Vinsmoke.

Minji Kim (LemmeSleep28)

Nicknames - Jiji, Minnie, Mini, Min, Minshi, Kimmy, Kim, Bear Girl, and Minji Burnedead.

Minji is a cold and placid female who is the mother figure of the group and is very tall. Despite her cold demeanor, she can sometimes be very friendly and respectful. However, her petty side can get to her sometimes. As she navigates the One Piece world after being dragged into it with Airi and Garam, she soon finds that her crush is Portgas D. Ace.

Yoonchae Jeong / Han (YourFavTiredGirl28)

Nicknames - Yoon, Chae, ChaeChae, Han, Yoonchip.

Yoonchae is a naive and sweet maiden who is very lovable by the trio but can also be lovesick. She acts childish, but nobody seems bothered by her unique personality. Due to her demeanor, people often attribute her to a puppy.

Nami

Nicknames - NamNam, Mi, Na, Cat Burglar Nami.

Nami is a smart and wise navigator of the Straw Hat Pirates, being more than just a cute face for their enemies. Despite her innocent appearance, she is quite a strong female and is very tactful about her approaches.

Nico Robin

Nicknames - Robin, Nico, Nini, Binnie. 

Robin is a smart and clever female who is the archaeologist and historian for the Straw Hat Pirates. She is in possession of the Flower Flower No Mi, which is a devil fruit.

Koala Koara.

Nicknames - Aussie, Ara.

Koala is a smart girl who is one of the rivals of Airi. She is the fishman karate instructor in the Revolutionary Army.

Boa Hancock

Nicknames - Snake Empress, Boba, Snake Lady, Hancock, Hannah.

Boa Hancock is a powerful warlord who rules Amazon Lily and all of their inhabitants. She is lovesick for Luffy and therefore is jealous of Robin and Nami's position on his crew for they have everyday interaction with him.