- Name: Iori Saeki (佐伯伊織)
- Birthplace: Kanagawa, Japan
- Birthdate: July 22, 1994
- Twitter: https://twitter.com/iori_saeki
- Website: NU-KOの秘密基地
- Production company: swallow 佐伯伊織
Iori Saeki was originally a doujin vocalist who debuted as NU-KO. She was one of the winner vocalists of the Anata mo★pop'n vocalist! contest from pop'n music 20 fantasia, along with 秋成 (who provided vocals for Intersection) and mami (who provided vocals for 情操ディストピア); she provided vocals for 恋愛観測 in that game. Since then, Iori has been commissioned for several BEMANI songs, mostly in the pop'n music series.
Iori Saeki is currently a voice actress belonging to swallow, PONY CANYON's voice actor office. Since then, she has deleted her old NU-KO named twitter account and started a new one under her real name. She is also currently the voice of Ren Akizuki in BandMeshi♪ Furusato Grand Prix (バンめし♪ ふるさとグランプリ).
- Iori has also sung songs in KONAMI's arcade game Otoca♥d'or (オトカ♥ドール). Its website can be found here.
- She is also the voice of Nyandra in that game, her first work as a commercial voice actress (at that time, she hadn't joined swallow).
- Outside of BEMANI, Iori has provided vocals for various doujin songs, often with Harunaba as the composer.
- ねこまんまチーム！ (member of, with wac)
- Neko M@mma Team (member of, with wac and m@sumi)
- pop'n fellows (member of, with Akinari and mami)