Nana Astar Deviluke[a] is a fictional character in the manga series To Love Ru, created by Saki Hasemi and Kentaro Yabuki.

In the series, Nana is an alien princess from the distant planet Deviluke who possesses the unique ability to communicate with different animal species.

Of the entire female cast of To Love Ru, Nana appears to be the least attracted to the protagonist Rito Yuki, although she eventually develops romantic feelings for him as the series progresses.

Nana Astar Deviluke has the appearance of a teenage girl with purple eyes and long pink hair, which she usually wears in pigtails on the sides of her head.

[9][10] Nana, alongside Momo, makes her first appearance in the 97th chapter of the To Love Ru manga, in which the twins arrive on Earth and transport basically the entire cast of the manga into a RPG world inside Trouble Quest, a virtual reality game programmed by Nana and Momo and that they use to determine whether Rito Yuki is worthy of being engaged to Lala or not.

The twins escape to Earth, where they teleport naked to Rito's bathroom at the exact moment he was there, and Nana consequently beats him up for seeing her and her sister undressed.

[21] In the anime adaptations of To Love Ru, Nana is voiced by Kanae Itō in Japanese,[24][25] while Allison Sumrall dubs her in the English version.

[29] Ever since her introduction, the character of Nana has become a popular subject of cosplay, causing a trend in Japan where female fan readers of the To Love Ru series attempt to replicate her iconic look.

[30] In 2015, the June issue of Shueisha's Jump Square magazine included the results of its popularity poll for the heroines of To Love-Ru Darkness.

[32] In a review for Motto To Love Ru, Theron Martin of Anime News Network (ANN) stated, "Nana and Momo explain enough about themselves over the course of this series that viewers who have not seen the OVAs will eventually be able to piece together who the twins are and what they're about.

"[35] A 1/4 scale figure of the character Nana wearing a green bunny girl suit was released in Japan in August 2019 for the price of 21,111 yen (excluding taxes).