Hyuga
High school 1st yearCall me "Onee-chan"♡Atago
High school 2nd yearSchool Parody Relationships GraphGive me a break already...FriendsMogami
Middle school 3rd yearBest friendsClassmatesSenpai-kouhaiSenpai-kouhaiMaizuru Private Women's AcademyMikuma
Middle school 3rd yearThinks she's noisy but doesn't dislike her. Kure Public Middle SchoolFriendsSenpai-kouhaiSasebo Public HighschoolSenpai-kouhaiwarmlyThinks she's cuteYokosuka Public HighschoolHaguro
High school 1st yearYamashiro
High school 3rd yearZuikaku
High school 1st yearNachi
High school 3rd yearAshigara
High school 2nd yearShigure
Middle school 1st yearShoukaku
High school 3rd yearShiranui
Middle school 2nd yearYamashiro's being...!Ise
High school 1st yearMichishio
Middle school 1st yearMyoukou
Girl's University undergraduateFusou
Girl's University undergraduateOnee-sama♡Kagerou
Middle school 2nd yearWell... do your best.Takao
High school 2nd yearBeloved, cute little sisterOne-hit killOriginal (armored sleeve, one touch) means "to win decisively in one move" which may refer to Shigure's advantage over Ise. Alternatively, it might mean that they're immediately on the defensive when they see each other, literally wearing armored sleeves. Another: first one to make a move winsSister in law
Ise and Hyuuga were originally going to be Fuso-class but were redesigned before construction began.