|This article is about a/an actress in Samurai Sentai Shinkenger.|
Runa Natsui (夏居瑠奈 (なつい るな)) appeared in the last few episodes of Samurai Sentai Shinkenger in early 2010, making history as the first ever female Red Ranger, and youngest Sentai "mom", Kaoru Shiba (Princess Shinken Red).
She was just over fourteen years old when she appeared in Shinkenger, making her one of the youngest actors to play a Ranger in Super Sentai, though the character of Kaoru was seventeen years old. Though the youngest actor to play a Sentai Ranger is Hisashi Sakai who was twelve when he portrayed Kou of the Howling New Star (KibaRanger) (who was nine years old) in Gosei Sentai Dairanger, the only main character child ranger, and Shota Taguchi who was portrayed Kotaro Sakuma (Koguma Skyblue) in Uchuu Sentai Kyuranger, and also she was still the youngest actress to play a Ranger until the place was taken by Yuno Fuse, who was just thirteen when she portrayed a character who briefly used the powers of Gokai Yellow in the Christmas episode of Kaizoku Sentai Gokaiger.
Runa Natsui reprised her role as Kaoru Shiba in the teamup movie Tensou Sentai Goseiger vs. Shinkenger: Epic on Ginmaku (January 2011), she then appeared a few months later in Kaizoku Sentai Gokaiger, in a two-part tribute to Shinkenger (Episode 11-12 and archive footage in Episode 45). She most recently appeared in Tokumei Sentai Go-Busters vs. Kaizoku Sentai Gokaiger: The Movie (January 2013).
She also appeared in the critically-acclaimed film School Days with a Pig which was based on a true story. She also appeared in several episodes of Kamen Rider Fourze.
- Tensou Sentai Goseiger vs. Shinkenger: Epic on Ginmaku (2011) - Kaoru Shiba
- School Days with a Pig | Buta ga Ita Kyoushitsu (2008)
- Don Quixote (NTV / 2011) - teenage Takako Iwakura (ep.8)
- Seigi no Mikata (2008-Japan-NTV) (NTV / 2008)
- The Bad Dad/Otoko no Kosodate (TV Asahi / 2007) - Rinko Yajima