In anime, some characters have eyes of different colors. The technical term for that in English is heterochromia, specifically, heterochromia iridis, which is having irises of different colors.
In Japanese, the term for heterochromia in general is its katakanization, heterokuromia ヘテロクロミア. The common term for heterochromatic eyes in anime characters is oddo-ai オッドアイ, "odd eyes."
Anime: Boku no Hero Academia, 僕のヒーローアカデミア (Episode 23)
- In Japanese
- List of Characters