Nana Astar Deviluke

Nana Aster Deviluke is the twin of Momo and sister to Lala. She is the second princess of Deviluke. She has the ability to speak to and understand animals. Out of all the main female cast she has shown the least attraction to Rito, regarding him as a "Beast". Even so, she has shown slight affection to Rito, with the notion that she has tried to sleep in his bed with him. In To Love-Ru, she used to be seen with Momo all the time, but in To Love-Ru Darkness, they are not together as often as before. This is because while Momo becomes more attached to Rito, Nana became friends with Mea Kurosaki, whom she hangs out with more often. Although Mea is a transformation weapon and has difficulty accepting the notion of friendship, she eventually becomes more open with her feelings to others through her friendship with Nana.

Appearance
Nana has long pink hair and purple eyes. In both To LOVE-Ru and To LOVE-Ru Darkness, Nana has pig tails. Like all Devilukeans, Nana also has a long black tail at her back, and like her sisters, she has a spade-shaped tail end. Nana also has a smaller bust than Momo which the she is teased about by her younger half. When Nana is fighting, her pupils become thinner and pointed.

According to VMC, her measurements are completely unknown, though this could just be their rude way of showing they don't notice her as opposed to her sister, whom they idolize.

Personality
Somewhat tomboyish, Nana is short-tempered and impatient, much unlike her twin sister. But underneath her brash, overreactive and angry behavior, Nana is actually very kind, helpful, cheerful and even loving. She has an open, sincere, and somewhat childlike side of herself that makes her cherish her friendships very much, which also makes her easily heartbroken when those friendships were ever lost or betrayed, such as with Mea, whom she considers her first true and closest friend.

Despite her tomboyish personality and temper, Nana has her vague charm that has even impressed some of the most mindless of individuals. Mea is an excellent example of this; When Nana was talking about how the two birds were going to fly west, Mea was astonished and amused when she found out that Nana could talk to animals, being fully accepting of this odd trait. Before, Mea was just a mindless being that was sent to Earth. Before she met Nana, Mea was following Nemesis's orders without question. Because of Nana's "charm", Mea has opened up since and has become best friends with her.

She can be very brave whenever her friends are in trouble. Examples of this event are when she risks her own life just to save Haruna and her dog, when Mea is trying to scare her away, or when a little monkey is about to get hit by a truck.

Nana hates being teased by Momo because of her flat chest. While Momo possesses a developed figure similar to their elder sister and mother, Nana is far less developed and is very sensitive about the fact. Momo passively and playfully teases her about it, but Nana occasionally becomes upset about it.

Nana seems to dislike anything lewd and impure, mostly referring to Rito and calling him a beast because of his bad habits. Originally, Nana was one of the few girls who didn't have any feelings for Rito, but eventually his kindness starts to grow on her, like when he helped her rebuild her friendship with Mea and hugged her in the process, which she remembered felt very good. Because of this, Nana developed a tsundere side to her when it comes to Rito. Sometimes when she is denying something, she makes a certain outburst (mostly involving Rito), and her pig tails seem to rise up.

Nana slightly matures over the series, as pointed out by Momo, and grudgingly notes that Nana might be surpassing her. When Lala was attempting to kiss Rito, Nana advices her that Rito has some complicated thing he needs to deal with first before the kiss. This shows that Nana has some concern over how Rito might be feeling. And because she avoids and denies love most of the time, she has taken more time to think about and examine her own feelings more carefully, which gives her a better understanding of how Rito feels about his complicated relationships at the present, and she may understand love better than even Momo.

Background
Ever since childhood, Nana and Momo always fought. Whenever they fight, their older sister, Lala, would always make a way for them to make up, and for Zastin not to be angry with them. An example of this is when they were children, and Momo and Nana were fighting. Zastin scolded them for fighting, but Lala caused her inventions to run amok then asked for Nana and Momo's help to catch them, so that Nana and Momo will work together, and so that Zastin would direct his anger towards Lala instead. Nana first made an appearance together with Momo in Chapter 97 of the To LOVE-Ru manga. They were responsible for the Trouble Quest, an RPG game that they programmed to see the true character of Lala's friends. After seeing that Lala had great friends surrounding her, they returned to Deviluke. A few chapters later, they went back to Earth after escaping from Deviluke and their studies. However, they forgot that Zastin was also staying on Earth, and was instructed by Gid to bring the twins back home. They tried escaping, but when Nana and Momo started fighting each other, Zastin, Maul and Smutts were able to catch up to them, and a battle ensued. It was revealed that Nana and Momo also have D-Dials, but instead of gadgets, they were able to summon plants and animals, respectively. In the end, they defeated Zastin and his henchmen, and they convinced their father that they're going to stay on Earth with Lala.

During Nana and Momo's stay in the Yuuki household, they created their own house in the attic using space distortion. They also took care of all their necessities to avoid bothering Mikan for cooking, cleaning, etc. However, they still come down sometimes to eat Mikan's cooking.

Throughout the series, Nana unconsciously develops affectionate feelings for Rito. Of course, she consciously dislikes him and thinks of him as a beast! Because of this, Nana usually has dreams of Rito "sexually" advancing towards her and she screams out "You beast!" in her sleep. Whenever she's asked of the situation, she glares and says, "Oh that Rito.....he's a beast!" and says no more. At this point in time, Nana was completely confused whenever her sister said, "Oh, I can always be Rito's mistress".

In To LOVE-Ru Darkness, Nana, along with her sister, become Sainan High's students, she makes friends with a girl named Mea and she gets shocked whenever Mea admits something perverted to Rito. Eventually, the friendship between Mea and Nana becomes very strong; however, Mea turns into her semi-weapon form and tells Nana that their friendship was not real! Nana was petrified and traumatized after she saw Mea's true form and personality.

Rito tried to console Nana. When that didn't technically work, Rito embraced Nana. With that hug alone, Nana finally realized what she had to do. She had to approach Mea and "open her heart". Obviously, Mea used her semi-weapon abilities to scare off Nana again; however, Nana has shown a huge amount of courage and she faced the heartless semi-weapon. Nana stood there boldly and she confessed her care for Mea. This somehow opened Mea up. Finally, Mea understood what a friend truly was. This part of the story has shown Nana's bold bravery against something quite deadly, and this has shown Nana starting to open up to Rito. In fact, she even tried to sleep in Rito's bed afterwards.

Powers and Abilities
She shares a connection to animal life, and has the ability to communicate with them. She would always use a D-Dial that her sister made for her to summon animals and milk whenever she needs them. Like her sister Momo, she also has the ability to shoot lightning.

Like her sisters, Nana also becomes weak whenever someone touches her tail. This weakness is usually taken advantage of by Momo whenever they get into fights. However, Nana also possesses the Devilukeans' superstrength and their bloodlust, making her very dangerous in battle.

Nana can be athletic as she is very good at sports, even being asked to join Sainan High's swimming club.

Trivia

 * Like the other parts of the Devilukean family, Nana's second name is a reference to the demon, Astaroth.
 * The Japanese name Nana means grace ironically, due to Nana frequently shown temper. Even so, she does seem to be quite shy and graceful at times when necessary, most likely due to her being raised as a princess.