Hitomi Sekine (Japanese: 関根 瞳, Hepburn: Sekine Hitomi, born 9 May 2000) is a Japanese voice actress and singer from Tokyo, affiliated with I'm Enterprise.^[1] She is known for voicing Mano Sakuragi in The Idolmaster Shiny Colors, Ryoko Sukuno in Shinobi no Ittoki, Ellis Seifort in Berserk of Gluttony, Koyuzu Koganei in Otaku Elf, and Celina in Goodbye, Dragon Life.

Hitomi Sekine, a native of Tokyo, was born on 9 May 2000.^[1][2] She wanted to become a voice actor after watching the anime Gintama on the recommendation of a friend while in the fifth grade of elementary school.^[3] She joined I'm Enterprise in April 2017, a month before her 17th birthday, after studying at the Japan Narration Actor Institute [ja].^[3][4]

In 2018, Sekine made her debut as Mano Sakuragi in The Idolmaster Shiny Colors,^[5] a sub-franchise in The Idolmaster franchise. Since then, she has performed as a singer on several Idolmaster music releases, including the 2018 single "The Idolmaster Shiny Colors Brilliant Wing 02: Hikari no Destination" (which charted at #11 in the Oricon Singles Chart) and the 2021 single "The Idolmaster Poplinks Poplinks Tune!!!!!" (which charted at #14 in the Oricon Singles Chart).^[6][7] She will reprise her role in the 2024 anime adaptation.^[8]

In June 2022, Sekine was cast as Ryoko Sukuno, a major character in Shinobi no Ittoki.^[9] In 2023, she starred as Ellis Seifort in Berserk of Gluttony, Mizue in Rokudo's Bad Girls, and Koyuzu Koganei in Otaku Elf.^[10][11][12] In 2024, she was cast as Celina in Goodbye, Dragon Life.^[13]

In 2018, Sekine became a member of Marine Entertainment [ja]'s voice acting unit TearLove.^[5] She remained active with them until their last concert in 2022.^[14] She and Misato Matsuoka later formed the rock singing duo Everdream [ja].^[15]