Misaki Nagatoro

"You came all the way out here. So I was going to tell you anything you wanted to know, every little detail about her... aren't you interested...?"

- Nagatoro's sister to Senpai

A girl whose surname is Nagatoro (長瀞), is a minor character of the Don't Toy With Me, Miss Nagatoro manga series. She is a university student, Hayase Nagatoro's older sister and her family's middle child. She likes to tease her little sister despite caring and loving her deeply as well as being a confidant and sort of role model for the protagonist. After realizing the true feelings between her younger sister and Senpai, she decides to help their budding relationship.

Her first name is currently unknown and Senpai and Gamo-chan only refer to her as "Big Sis-Toro" (姉瀞).

Appearance
She is a beautiful, shapely and average-statured young woman with medium-length, straight black hair that falls on her forehead in a thick fringe (later decolorized and shortened at the tips). She has relatively light skin, and large, expressive, yet somewhat tired-looking dark amber-maroon eyes, with an attractive mole under the left one. Her ears are not pierced and she does not seem to wear earrings or any kind of jewelry. The girl is very similar to her younger sister in terms of physical shape, sharing her lean, athletic, slender and flexible physique albeit with a noticeably larger bust size due to being a young adult rather than a teen. The girl sports almost always a wide, kind and sweet smile displaying incisors slightly pronounced than average. Also, just like her sister, she tends to widen the pupil of just an eye whenever she grins.

She typically wears practical or sports clothes, sweatshirts, tight or short pants and sneakers.

Personality
Nagatoro's sister is a calm, cheerful, easy-going and level-headed young woman with a bit of liking for teasing, just like her little sister Hayase, although at a much lower level. She loves to joke and is very friendly, when first introducing herself to Senpai she makes him believe she would have called the police and have him arrested for trespassing into her home, only to reveal she was merely kidding and then inviting him inside. A very mature and responsible person, she behaves like an excellent hostess to Senpai and takes good care of her sister, to whom she's very protective and caring. She's described as the type who enjoys spoiling her little sister. Yet she has also proved to know Hayase so well that she managed to easily "manipulate" her, making her "dance in the palm of her hands" - much to Senpai's astonishment - even to the point of talking her around when she acted stubbornly or scolding her about her manners when she didn't behave, showing to be very polite and well-mannered. She is very excitable, inquisitive and honest, despite this blunt attitude of hers sometimes creating awkward situations and being a source of embarrassment for Hayase, albeit mostly unintentional. According to her little sister, she tends to "run her mouth off". Also, it's insinuated that she may be quite vain and even a little bit megalomaniacal.

It's also shown that Nagatoro's sister could emanate the same intimidating aura as her younger sister, and, whenever this happens, she is depicted with hellish shadows all over her face and disturbingly huge eyes pupils, making her look like a ghostly entity.

As the "cool big sis" and model figure to Nagatoro, she's a sort of a confidant to her; Nagatoro told her about Senpai more than once, indirectly making her aware of how she felt about him as well as their "erotic" interaction. Although she somewhat likes to tease her little sister and sometimes embarrass her, treating her like if she was still a little kid, or teasing her about romance, she does love her deeply, is rather protective of her and willing to help the relationship between her and Senpai, often offering to tell the latter more about Nagatoro if he wanted to. It is also strongly implied that Hayase looks up to her greatly, trying to emulate her attitude and having learned how to "tease" boys from her, as well as often going to her for advice, looking at her skills in awe listening to her lessons and eventually doing what she suggested despite her stubbornness.

In stark contrast with the maturity she usually displays, the young woman seems to have a habit of eavesdropping and very little sense of personal space. She can also be quite careless since she forgot to close the house front gate before going shopping.

Early life
The young woman was born in, , the second child and older daughter of the Nagatoro family. She has a close relationship with both her older brother Ichirō and - especially - her younger sister Hayase, while her parents are middle class that often work late. She grew up in a house in the suburbs right in front of a park, under a ; as a kid she went every year to the summer festival with her family, enjoying the fireworks contest at the beach.

After graduating from high school, she enrolled at a university somewhere in the town or very close to it, keep living with her family and proved to be such a good and hard-working student to have a huge amount of free time between her classes.

After Hayase began attending high school, she started to talk a lot to her about "her Senpai" and their interactions, leading the young woman to realize her sister's crush on him.

First name arc
One day, after her little sister got the flu, she stayed at home with her and took care of her. In the afternoon, she went to the kombini to grab a pudding for Hayase while she was taking a nap, accidentally leaving the front gate open, and when she came back home, the young woman noticed a boy in the front yard; recognizing him as Senpai she pulls a prank on him pretending she mistook him for a thief, before introducing herself as Nagatoro's sister and inviting him inside. After checking on her sister and discovering she was still sleeping, the young woman offered Senpai some snacks and revealed to him that her little sister talked a lot about him. She also asked if there was anything he wanted to know about her, stating that she would reveal to him whatever he want regarding her sister. Before Senpai could make his question, Nagatoro entered the kitchen yawning, with messy hair and comfy pajamas, blushing in embarrassment after discovering that he was there.

Embarrassed, the girl immediately went to dress and do her hair, scolding Senpai for not having called nor warned her before coming to her house, to which he replied that he sent her a text, although she yelled back at him that she was sleeping. After telling her little sister not to be so angry, the young woman acted as a pacifier preparing her little sister a special marlowe pudding with fruit and cream to calm her down, saying that they should all sit and chat a little. However feeling ashamed, Nagatoro asked Senpai to come to her room and forbid her sister from entering. Regardless of this, she later entered the room to bring them something to drink and caught her little sister feeding Senpai with a spoon commenting the boy does indeed seem interested in "every little detail" of her little sister. Blushing vividly, Nagatoro sent her sister out of her room, then she asked Senpai what does she meant by her last sentence.

A few minutes later, having eavesdropped on her sister and Sanpai's conversation regarding the boy wanting to know Nagatoro's first name but lacking the courage to ask it directly, she stormed once again into the room calling her little sister "Hayase" and bringing the photo album of her primary school years to show it to Senpai. Regardless of Nagatoro yelling at her to get out of her room, the young woman continued to show an embarrassing picture of "little Hayase" - that she deemed "cute" - to Senpai.

A few days later, Senpai caught the flu and Hayase visited him at home, calling her sister to inform her that she would be home later than usual due to wanting to nurse him. It's implied that she teased her little sister about the romantic meaning of said gesture, since the girl blushed vividly, hushed her and quickly hung up the phone.

Christmas
Right before Christmas Eve, during snack time, Hayase meekly asked her for advice regarding what to buy someone for Christmas. Delighted by the question, and guessing the reason, the girl asked her younger sister if it was intended to be a present for "someone special", which Hayase denied embarrassed, causing her older sister to tease her that if it wasn't a special person then consumables like snacks or bath salts would have been fine since those things got used up and wouldn't get spoiled. Hearing that she should give something that would "be gone", Hayase got sad, but she quickly cheered her up saying that she might give something that would last as a Christmas gift, suggesting she take something "he" would use every day. Overjoyed, her little sister thanked her and the young woman explained to her that she also would have liked to receive something that would last as a Christmas gift from Hayase, right before joking about planning to give her sister a life-size doll of herself for Christmas. Listening to her older sister's advice, eventually, Hayase got Senpai a scarf.

First date arc
When Senpai invited Nagatoro to have a date at the aquarium, she was seen watching over her little sister as the latter decided what clothes to pick up. A few days later, when her sister tried to made a bento for Senpai and planned to prepare a special with spicy curry to surprise him, but accidentally burned it, thus getting upset, her sister entered the kitchen and - despite a little embarrassment from the latter - was happily greeted by Gamo-chan, Yoshi and Sakura, who were all in video call; the young woman suggested her little sister make salmon-filled  instead, stating they're the base of every bento. Saddened by said suggestion, Hayase protested that it will have been too banal and won't have surprised him, yet she was convinced when her sister told her it will make her feel better to see him happy rather than surprised. Then, not wanting to waste the tonkatsu that Nagatoro has accidentally burned, she decided to have it for breakfast showing Hayase how to scrape off the burnt bits, smother it in melty cheese and then grill it in the oven to make a "cheesy pork steak". Amazed, her little sister complimented her due to not being able to smell burnt anymore, and she explained that that's the meaning of using some cheese. Only after she has given a bite to the meal, the younger Nagatoro remembers that she had placed spicy curry in it, however, the older one has a "foodgasm" due to her love for spicy food.

Later that day, Hayase gave the salmon-filled onigiri to Senpai and he happily complimented it, making the girl feel exactly like her sister had said.

Manga

 * Chapter 59
 * Chapter 60
 * Chapter 61
 * Chapter 62
 * Chapter 63
 * Chapter 65
 * Chapter 87
 * Chapter 92

Bonus

 * Bonus 16
 * Bonus 20

Trivia

 * Her little sister Hayase always refers to her as "Onee-chan" (お姉ちゃん) a Japanese term that means "big sister" in a cutesy and affictionate way and could also be used to address slightly older women, regardless of blood relations.
 * She is the eldest child in her family.
 * She shares the "Noodletoro" pose with her sister as, just like Nagatoro, she's sometimes drawn with noodly arms when she gets playful with the latter or Senpai.
 * In addition to this, the Nagatoro sisters also shares several others similarities in body language, such as: the same expression when laughing heartly, the same way of steeple their hands while talking, the same cat-like gaze, the same grin as well as the tendency to widen the pupil of just an eye when doing it, the same devilish smirk and they also tend to unconsciously mirror each other's movements while talking face to face.
 * The young woman has very sweet tooth and a fondness for puddings also, she has impressive cooking skills and a deep love for spicy food.
 * Due to Chapter 59 being named after one of her lines, she is the third character after Nagatoro and Gamo-chan to ever name a chapter; the fourth being Sunomiya, the fifth Senpai himself, the sixth Shikki and the seventh Sakura.
 * She is the first character to have ever called the protagonist by her first name, thus revealing it to the readers and Senpai himself.
 * Aesthetically she bears a strong resemblance to Bakemonogatari ' s character Ougi Oshino.
 * Her smartphone has a plain transparent case.
 * When the young woman reappear in Chapter 87's cover after having been featured in her debut arc and a bonus chapter, her appearance is altered a bit as her hair are colored lighter and cover her ears completely; moreover her mole appear to be missing.
 * As later shown in Chapter 92 only her hairstyle was changed, implying she could have decolorized her hair and shortened their tips.
 * The young woman is the first adult-aged character to have been shown naked (Bonus 20), due to the only other characters to having been shown in the nude being the high schoolers-ageds Nagatoro, Gamo-chan, Yoshi and the former President who, albeit being 18, in Japan is tecnically still a minor, since the legal age is 20.
 * The color with whom she’s associated in her profile page on the anime official website is ligh pink.