Being sent as a spy by her father, her appearance was that of an androgynous male with long Blonde Hair that is tied up in a ponytail. She has purple eyes and wore the same IS Academy uniform as Ichika. Later on in the series she decided to re-introduce herself to the class as Charlotte Dunois, and began wearing a female uniform. Her training uniform also changed to the female version with orange edges and has changed to a one piece suit.
Charlotte is very kind young French woman, always maintaining a polite demeanor towards everybody. She has inherent dislike for lying to anyone, as much as she mentions that she is relieved she was able to tell Ichika the truth and that she apologizes for having to lie to him all the time. She is one of the two girls that does not have the Tsundere attribute; the other being Laura Bodewig after their fight in the tournament and it appears that She gets along with Laura the most (Exhibit A Above... Kawaii). It must also be noted that unlike other girls, who primarily focus upon making Ichika fall in love with them, Charlotte prioritizes making Ichika happy over anything else. Due to this, Ichika views her as the nicest girl among the five (He's right about that), even going as far to say that her smile is that of an Angel/Goddess. The only fault that Charlotte has is when she is angry, She tends to keep this facial expression (with the addition of the usual blood vein mark), which then Ichika refers to her as the Smiling Angel of Death. This, ironically, makes her the scariest person to anger. She is definitely shown to be quite mature, She also doesn't mind being girly or childish, such as getting Laura and herself in Neko Jammies and even teasing her with them although whenever Ichika walked in on them both they became embarrassed when he saw them both. Charlotte can also be very impulsive, usually creating very awkward and embarrassing situations for her and Ichika, only realizing what she's doing or has done when it is too late, such as when she brought him into a changing room to hide him from the other girls, only to start changing her clothes anyway.
Lingyin Huang, or Rin is the second childhood friend of Ichika and an IS Representative of her Home Country of China and Class Rep of Class 2. She is the third Heroine in Infinite Stratos that is trying to gain Ichika's love. Rin Is a young teenage girl with light brown hair tied in twin tails with a yellow ribbons at both sides. Compared to the other IS Heroines, She's quite petite. She has green eyes and usually wears her IS Academy uniform. Her uniform seems to be specifically altered for her as her sleeves are detached from the uniform. In all of her appearances, She often appears smiling with an exposed fang, which is why many fans misspell her name as "Fang Lingyin". For her IS practices and Battles, She wears a pink version of the training uniform.
Rin is depicted as a very energetic Chinese girl with a slight competitive streak. This is seen when Houki and Cecilia were arguing with her about her relationship with Ichika. She effectively answers them while hinting that she has an advantage over them (e.g. when Houki said she has eaten and slept with Ichika when they were kids, Rin said that He has been coming over to her place to do the same when they were in grade school). In her middle school year, she was usually the target for pranks due to her nationality. However, Ichika helped protect her from these situations (e.g. when he protected her from 4 school bullies). Because of this, she developed feelings for him and made him promise that if she became an excellent cook, He would become her boyfriend. When she meets Ichika again at the Academy quickly became disappointed and extremely hostile to him because he forgotten the details of that promise (P.S Ichika is Dumber than a bag of hammers). When he asks her what she means, She just says that it means she will give him free meals, hoping he would not understand the meaning. She can also become extremely jealous when there are other girls are around Ichika who are trying to get his attention, to the point of showing the stereotypical lifeless eyes of a "yandere" girlfriend. To a certain extent, Rin has also become close friends with Cecilia, compared to the other girls. This relationship is anagulous to Charlotte and Laura's close relationship in the Light novels. This was proven in the Anime when Lingyin offered to place sun tan oil on Cecilia's body in Ichika's place, and when the two worked together to spy on Ichika and Charlotte's date with Laura later tagging along with them. Also Rin is very sensitive when it comes to her bust size. She can easily become enraged when her size is mocked or pointed out by others. Her friends are aware of this and don't talk about it ( in the Light Novel, Houki made it a point not to ever complain about her large breasts in front of her). Strangely, She usually brings up the topic when she starts thinking about it or notice other girls breasts. In Season 2, She became enraged and jealous when she saw Ichika look at Charlotte's breasts, believing he was only focused on them.
SO THERE YOU HAVE IT!! WAIFUS 30 AND 31!!! THESE TWO GIRLS ARE MY ABSOLUTE FAVORITES IN INFINITE STRATOS!! I HOPE YOU GUYS LIKE THEM!!! #InfiniteStratos #FrenchBeauty #CharlotteDubois #ChineseBadass #LingyinHuang #MyWaifus #YouCan'tHaveThem