Suggestions by @emikotadami

Kiernan Shipka

as Vinsmoke Reiju (24) in One Piece

Score: +1

Nia Jax

as Boa Marigold in One Piece (Netflix Live Action)

Score: +3

Finn Wolfhard

as Monkey D. Luffy (19) in One Piece

Score: +2

Tyler Lawrence Gray

as Portgas D. Ace (20) in One Piece

Score: +1

Christian Bale

as Crocodile (46) in One Piece

Score: +1

Alex Høgh Andersen

as Eustass Kidd in One Piece Live Action Fancast

Score: +1

Minji

as Sarada Uchiha (12) in Actresses (Some have Kpop Idols) as Anime Main Female Characters

Score: +1

Karen Fukuhara

as Tashigi (23) in One Piece

Score: +1

Erin Maloney

as Actress #20 in One Piece Live Action: Actresses To Play Nico Robin.

Score: +1

Elizabeth Debicki

as Actress #15 in One Piece Live Action: Actresses To Play Nico Robin.

Score: +1

Allie Marie Evans

as Mikita (24) in One Piece

Score: +1

Cassian Bilton

as Donquixote Rosinante in One Piece

Score: +2

Oscar Isaac

as Crocodile in One Piece

Score: +2

Erin Moriarty

as Monet (30) in One Piece Live Action

Score: +2

Shin Ryujin

as Nobara Kugisaki (16) in Actresses (Some have Kpop Idols) as Anime Main Female Characters

Score: +1

Hong Eunchae

as Nezuko Kamado (14) in Actresses (Some have Kpop Idols) as Anime Main Female Characters

Score: +1

Anthony Starr

as Donquixote Doflamingo (41) in One Piece

Score: +1

Dia Frampton

as Makino (31) in One Piece

Score: +1

Léa Seydoux

as Portgas D. Rouge (Age: Unknown) in One Piece

Score: 0

Ashley Callingbull

as Raki (22) in One Piece

Score: +1