Chifuyu Orimura

Chifuyu is seen to be a very stern and strict woman, even to her own family, as seen when she tells Ichika to call her Orimura-sensei instead of his more familiar Chifuyu-nee ('Big Sis Chifuyu'). She is also very prideful and stoic, having cared for Ichika since they were young, and therefore is forced to essentially be a parent to him. Also, being a very skilled IS instructor, Chifuyu has stated that what makes her strong is her little brother Ichika, for it is he who gives her strength. She has a following of many girls who admire her, being the first Mondo Grosso champion, and call her things like Onee-sama (very respectful 'Big Sister') as well as hang onto her every word. Chifuyu thinks how amazing that it seems "all of the idiots have come to her class" (referring to her students). In one way or another, Chifuyu often gets particularly annoyed whenever the girls start making disturbances inside the school, especially if such cases involve Ichika. Despite this, she still cares about all her students more than almost anything in the world, with only her younger brother being more important to her.

However, as a teacher, she is simply put mercilessly. Handing out chops, slaps, and even genuine punches to her own students for even the slightest of offenses. She is also very unreasonable, as despite being the one who made Ichika go to the academy and knowing fully well he had no way or reason to learn about the IS before, she refuses to give him any slack as a teacher. Chifuyu is also very prideful, stubborn, and has a problem with showing her emotions or praising others, especially Ichika. This cause Maya to often tease her about to which Chifuyu treats her by sparing with her as a punishment. She also thinks highly of herself as a woman, saying she could have gotten married already if she didn't have to look after Ichika (which is ironic as others note they look more like a married couple than siblings). During the seaside trip, she proudly wore a revealing black bikini that showed off her figure without any signs of embarrassment.

Despite her strictness, it seems she also has a far more casual side, that of a normal woman who enjoys drinking alcohol (which apparently even Laura Bodewig does not know of, despite having trained under her for a full year) and messing with her juniors from time to time. She acts very differently at home, being extremely casual and relaxed, which is why Ichika was caught off guard so much on the first day at school. She doesn't do much housework, leaving Ichika to tend to things. She also does like to tease others on occasion, especially Ichika, who is very susceptible to her. When she starts drinking, she tends to loosen up a lot. She also becomes more teasing towards those who happen to be around her in her drunken state, even joking about their body in ways she normally wouldn't[1].

Chifuyu manga casual Chifuyu when she loosens up She is also very protective of Ichika, as he's the only family she ever had, and considers him to be vitally important to her[2]. She was the one to enroll him into the IS Academy almost immediately after it was confirmed that he had the ability to pilot the female-exclusive IS units. Some of the characters noted that her closeness with him seems a little suggestive, which only serves to incur a bit of her wrath when they tease her about it. She is also unable to admit and express her affection to Ichika due to her personality and pride. Although, in rare cases show hints before instantly turning to her usual behavior. Tatenashi said the reason why Chifuyu is so strict with Ichika is because she's afraid to lose him. However, there are times when she doesn't bother to help her younger brother at the academy, thus she will step in when they're about to go to far

the IS Academy, cityscape, country side, or beach.