Aiko Ōkubo is a Japanese voice actress and narrator born on November 14, 1981, in Tokyo, Japan. She began her voice acting career in the mid-2000s, gradually building a portfolio across anime television series, original video animations, and video games. Throughout her career, she has been affiliated with several talent agencies, including TAB Production, Quatrestella, and as of April 1, 2018, she is affiliated with Remax.

Ōkubo has built a substantial body of work in the anime industry, taking on a wide range of roles. Her early work includes supporting parts in series such as K-ON!, where she voiced a teacher, and Blood+. She is recognized for her performances in various original video animation series. Among her notable roles are Alicia Arctorus in Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru, Haruka Higashikaze in Akikan!, and Koyori Tōdō in both A Bridge to the Starry Skies and Hoshizora e Kakaru Hashi. Her filmography also includes the role of Chisato in Love Bitch, Akiha Byakko in Haramasete Seiryū-kun!, Yurine Miyauchi in Saimin Ryōjoku Gakuen, Misao Sasaragi in Kurutta Kyōtō Danzai no Gakuen, and Yume Asano in The Wife is Micael. In addition to these, she has appeared in mainstream anime like Yozakura Quartet as V Juri F, Nura: Rise of the Yokai Clan as Kokehime, and Fairy Tail as a village girl. Her career also features more recent roles in series such as The Eminence in Shadow as a teacher and Undead Unluck as a nurse.

Beyond anime, Ōkubo is notably active in the video game industry, where her vocal range allows her to portray a wide variety of characters. Her game credits are extensive and include Lillet Blan in GrimGrimoire, Abigail Creese in Bloodstained: Ritual of the Night, Mao in the 2025 remake of Trails in the Sky 1st Chapter, and roles in major titles like CookieRun: Kingdom and Granado Espada. She has also contributed to fighting games, voicing Zohar in Under Night In-Birth Exe: Late[st].

It is a common practice in the Japanese voice acting industry for performers to use aliases to separate their work in mainstream media from their roles in adult-oriented productions. Aiko Ōkubo is widely known to work under the pseudonyms Momoi Ichigo and Yamato Sakura for such projects. Her extensive work under these names includes numerous roles and vocal performances in visual novels and adult animations.