|Likes||Jojo's Bizarre Adventure|
|Japanese Voice Actress/Actor|
Personality and Looks
Natsukawa has long silver hair and blue eyes and is constantly confessed to by the males in the school but always turns them down. At the start of the series, she was confessed 58 times in 2 months, She hates romance. She can be evil and mischievous outside of the school. She is cunning and manipulative as she forced Eita to be her "boyfriend" and even threatening to leak his diary secrets onto the Internet. She likes to quote scenes from the manga JoJo's Bizarre Adventure. But deep in her heart, she is good. Her twisted personality is caused by her family problems which also caused her to hate anything about 'love'.
She spent nine years overseas. Her family was situated in Sweden and she also has a complicated relationship especially with her father which particularly accounts for her twisted personality. She was known as the jewel of the Natsukawa family and was used as a tool and accessory by her father to show off to his high society after taking her away from her mother. She's always been waiting for her mother to come back.
Natsukawa blackmailed Eita so she can be his "girlfriend" so the boys from the school would stop confessing to her. When she isn't together with Eita, she is bold and cold; but when she is, she acts more evil and very devious, and loves to use words to trick him. One of her antics is reading Eita's notebook of fantasy that is filled with embarrassing things out loud in front of him, often with Chiwa and/or Himeka around, causing Eita to squirm in embarrassment. Although she just used Eita to form a faux relationship in the beginning, she eventually grew genuine feelings for him without actually realizing it.
In the end of Volume 6 of the light novel, after a tremendous fight with Himeka who accused Masuzu of falling for Eita, the book ends with Masuzu severing the ties with Eita, freeing him from the contract.
In the anime, they become real boyfriend and girlfriend and Eita says that he loves her, after understanding her story by Mana. He kissed her, after that.
Natsukawa and Harusaki were love rivals, always fighting for Eita's love. In the last episode of the anime she steals a kiss from Eita, which Natsukawa sees and then the episode ends with them having a stare down.
When Himeka gave the club "Z"-like kanji accessory for her cellphone, she called her "real".
Ai unexpectedly managed to guess the real reason why Masuzu started dating Eita and ask Masuzu about it but Masuzu avoids the question by making a joke on the onion she peeled. Eita also heard their conversation.
Natsukawa tried to get Saeko, Eita's aunt, to believe that she and Eita were truly a couple. However Saeko was smart enough to see that they were faking the relationship much to Natsukawa's frustration.
Mana is Masuzu's little sister. They're seen not in good relationship, but Mana deeply loves her bigger sister and reports her activity to their father. Mana tells Masuzu's story to Eita, who realizes that he's in love with Masuzu and says that he loves her.
- The word "夏" (Natsu) on her surname means summer, and the word "川" (kawa) means river. Combining two words would make her surname mean "Summer River".
- Masuzu has a habit of going commando (not wearing panties) which she often teasing Eita by flashing her bottomless tights.
- She suffered a mental breakdown cause by identity crisis as a result from having to put up the false personality for her father for a long time.
- Although she is good looking in her swimsuit which often cause her to becomes the center of attention among men, Masuzu actually can’t swim at all and drowned after a few meters of struggling.
- She often uses her spare time to read Eita’s notebook to dig up his embarrassing fantasies to use against Eita and writes it down when she found out something new about him. But eventually she’s touched by the last entry of Eita’s notebook which states that he will become a doctor and cure Chiwa’s injury.
- Masuzu discovered Eita's notebook in a used bookstore in front of a station.
|Eita Kido ⋅ Masuzu Natsukawa ⋅ Chiwa Harusaki ⋅ Ai Fuyuumi ⋅ Himeka Akishino|