Suggestions by @palamepaj

Ladybug

as French in Characters by heritage

Kazuma Kiryu

as Japanese in Characters by heritage

Sunfire

as Japanese in Characters by heritage

Yukio (Marvel)

as Japanese in Characters by heritage

Ayano Hime

as Japanese in Characters by heritage

Makoto Itou

as Japanese in Characters by heritage

Kimi Finster

as Japanese in Characters by heritage

Hiruzen Sarutobi

as Japanese in Characters by heritage

Tanjiro Kamado

as Japanese in Characters by heritage

Akiko Ayanaka

as Japanese in Characters by heritage

Jin Kazama

as Japanese in Characters by heritage

Akuma

as Japanese in Characters by heritage

Yoshikage Kira

as Japanese in Characters by heritage

Tuxedo Mask

as Japanese in Characters by heritage

Dawn

as Japanese in Characters by heritage

Itachi Uchiha

as Japanese in Characters by heritage

Kagome Higurashi

as Japanese in Characters by heritage

Josuke Higashikata

as Japanese in Characters by heritage

Zuko

as Japanese in Characters by heritage

Guido Mista

as Italian in Characters by heritage