Cinque's older cousin and an acquaintance to Becky. She is also Cinque's rival in the Iron Athletics (アイアンアスレチック Aian Asurechikku?), a game closely related to Ninja Warrior. In the second season, Nanami is summoned to Flonyard by Leonmitchelle to serve as a heroine under her, in the same fashion as Cinque is chosen as Milhiore's hero.

Dog Days takes place in the world of Flonyard, an alternate Earth inhabited by beings who resemble humans, but also have the ears and tails of specific animals. The Republic of Biscotti, a union of dog-like citizens, has come under attack by the feline forces of the Galette Leo Knights. In an effort to save Biscotti, Princess Millhiore summons a champion from another world in order to defend her people. That champion is Cinque Izumi, a normal junior high student from Earth. 
 
Agreeing to assist Biscotti, Cinque retrieves a sacred weapon called the Palladion and prepares for war. In Flonyard, wars are fought with no casualties and are more akin to sports competitions with the goal of raising money for the participating kingdoms. Cinque is successful in his role as Biscotti’s champion, but learns that a summoned champion cannot be returned to their home world. The scientists of Biscotti will endeavor to find a way for Cinque to return home, but until they figure something out, he must serve Princess Millhiore by continuing to fight as Biscotti’s hero.

__Height:__ 153 cm 

[Twitter](https://twitter.com/NM_NANAPARTY) | [Website](https://www.mizukinana.jp/) | [Youtube](https://www.youtube.com/user/mizukinanaKING) | [Instagram](https://instagram.com/nanamizuki_nm7)

She is admired by many of her fellow actors and fans because of the fact that she has a great amount of power and strength in her singing voice, which surprises many fans due to her regularly petite stature. She was also the winner of the "Best Musical Performance" award in the first Seiyuu Awards. She was also part of the quartet Prits alongside Yumiko Kobayashi, Natsuko Kuwatani, and Hisayo Mochizuki (all four voiced characters in the anime _Sister Princess_). Her singing style comes from singing Enka since she was young.

In July 2020, she married someone from the music industry, and they had their first child on March 16, 2021.

__Non-Anime Roles:__
- Ittasha in Bakuage Sentai Boonboomger

The second season of Dog Days. 
 
Cinque returns to the land of Flonyard in Dog Days' to resume his duties as the hero of the Biscotti Republic and it's as though he never left! 
 
The difference this time is that he's brought two friends with him who become heroes in their own right: childhood best friend Rebecca Anderson, who becomes the hero for the Principality of Pastillage at the urging of their leader Princess Couvert Eschenbach Pastillage, and his cousin Nanami Takatsuki, who becomes the hero for the Galette Lion Dominion. 
 
As with the first season though, with so many secrets to be uncovered and mysteries to be solved, will there even be time for the athletic events that these three hyper and athletic teenagers love to participate in so much?

The third season of Dog Days. 
 
Cinque Izumi, Nanami Takatsuki, and Rebecca Anderson must once again embark on a journey to the continent of Flonyard and participate in the friendly war games of the three allied nations: Biscotti Republic, Galette, and Pastilage. Cinque is Biscotti’s hero, who also happens to be the cousin of Galette’s hero Nanami. Rebecca is Pastillage’s hero and a dear friend of Cinque. 
 
Dog Days'' begins in the human world. Rebecca prepares her things for her journey back to Pastilage from Japan. Meanwhile, Cinque and Nanami set out to travel to Biscotti and Galette, respectively, all the way from England, when suddenly, a freakish streak of bad luck—in the form of lightning, of course—sends them off course. They soon find themselves in the great Dragon Forest, protected by a Dragon Priestess named Sharu. The Dragon Priestess informs them that demons threaten to invade the forest, as well as the whole continent of Flonyard! 
 
It looks like a real war is about to begin in Dog Days''. Can these three heroes save the whole continent from these evil beings?

Special episode delivered to customers who pre-order all six Blu-ray and DVD volumes of Dog Days''.