Nana Astar Deviluke

Nana Astar 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". Although she like the rest has developed feelings of her own for Rito, though the emotion seems closer to a brother complex.

Nana's most active and noticable relationship is with her twin sister Momo. While the two love each other and are often seem spending time together they are naturally polar opposites. From an early age they have always been fighting and it was only through the efforts of her elder sister Lala that there relationship remained good.

Nana envys Momo for both her confidence and her beauty. While Momo possesses a similarly developed figure to their elder sister and mother, Nana is far less developed and is very sensitive about the fact. She is also the most immature of her siblings even compared to Lala who while acting childish at times, has a very motherly and mature side.

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 tramatized 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 once.

Lala, Haruna, Momo, Yui, Yami, Mikan, and Run are part of Momo's "Harem Plan"? Yes, it turns out that even though Nana is trying desperately to keep the other girls away from Rito, she's only indirectly creating her own unification of the entire female cast. Are Saki, Rin, Mea and even Dr. Tearju taken under consideration? Indeed, eventually, Nana's own efforts will help form the "Harem Plan". Ironically, Nana is counsciously trying to do the complete opposite.

Trivia

 * Like the other parts of the Devilukean family, Nana's second name is a reference to the demon, Astaroth.