Kokoro Ōmori

Born in Osaka on November 17, 2002, Kokoro Omori is a Japanese voice actress under 81 Produce. Inspired by Kamen Rider Den-O and Pokémon as a child, she won the Excellence Award at the 14th 81 Audition, joining the agency in April 2023. Best known for voicing Mia in The Appraiser Is Actually the Strongest, Emilya Tarini in Dahliya Wilts No More, and Nishi in You and I Are Polar Opposites.

Kokoro Omori’s Rising Career in Japanese Voice Acting

Born in Osaka in 2002, Kokoro Omori (大森こころ) is a Japanese voice actress affiliated with 81 Produce. Her path into the industry was sparked by childhood exposure to Kamen Rider Den-O and the Pokémon anime series, which ignited her ambition to become a voice actress. She won the Excellence Award at the 14th 81 Audition and officially joined 81 Produce on April 1, 2023.

Most Known Roles of Kokoro Omori

Mia – Fuguu-shoku [Kanteishi] ga Jitsu wa Saikyou Datta (The Appraiser Is Actually the Strongest)
Emilya Tarini – Madougushi Dariya wa Utsumukanai (Dahliya Wilts No More)
Kaede – Honey Lemon Soda
Wilgo – Yasei no Last Boss ga Arawareta! (A Wild Last Boss Appeared!)
Drola / Braccari / Luzan – Genshin Impact
Nishi – Seihantai na Kimi to Boku (You and I Are Polar Opposites)

Breaking Into Anime and Games

Omori’s first major anime credits came in 2024, with supporting roles in Boku no Tsuma wa Kanjou ga Nai and a recurring part as Emilya Tarini in Dahliya Wilts No More. Her game work has included characters in Genshin Impact, Uma Musume Pretty Derby, and Project Sekai Colorful Stage! feat. Hatsune Miku.

Seihantai na Kimi to Boku and Lead Debut

The Winter 2026 anime Seihantai na Kimi to Boku (You and I Are Polar Opposites) marks a significant step forward, with Omori taking on the lead role of Nishi – a shy, easily amused girl who contrasts sharply with the show’s rational female lead. This represents her first main cast billing in a television anime series.