Natsuki Aikawa is a Japanese voice actress born on August 21, 1990, in Kyoto Prefecture. She is affiliated with the talent agency Ken Production. Aikawa is a graduate of the voice actor training school School Duo, where she was part of its 13th graduating class.

Her career began in 2012, and she has since built a diverse portfolio of roles across television animation, original video animations, and video games. One of her earliest and most prominent roles is Petra Ral in the globally renowned series Attack on Titan, a character she first voiced in 2013 and has reprised in subsequent projects, including the original video animation Attack on Titan: Ilse's Notebook, the theatrical compilation films, and the parody series Attack on Titan: Junior High. This role remains one of her most recognized performances.

Aikawa has contributed to a wide range of anime series, demonstrating her versatility. In 2015, she voiced the centaur character Centorea in Monster Musume: Everyday Life with Monster Girls, a role for which she also performed character songs. The same year, she played Vera del Gnoni in Sōkyū no Fafner: Dead Aggressor - Exodus. The following year, she was cast as Hiromi "Kuro-chan" Kuroki in the maritime action series High School Fleet.

Her television animation credits in subsequent years continued to expand. In 2019, she voiced Takane Hibino in Circlet Princess. Aikawa took on the role of Kureha in the controversial series Redo of Healer in 2021. More recently, in 2022, she was cast as Omatsu in My Master Has No Tail, and in 2023, she voiced the character Bao in Dead Mount Death Play. Her filmography also includes minor roles in long-running and popular franchises such as Black Butler, The IDOLM@STER Cinderella Girls U149, and Rurouni Kenshin.

In addition to her anime work, Aikawa has lent her voice to various video game projects. Her game credits include the action game Attack on Titan: The Last Wings of Mankind and the tactical action game Hyrule Warriors: Age of Calamity, among others. She has also performed character songs, contributing to the music side of the anime industry, particularly for her role in Monster Musume.

Aikawa's skills include speaking in her native Kyoto dialect and the broader Kansai dialect. She is also noted for her abilities in singing and cooking. In March 2019, she announced her marriage and pregnancy on her social media.