History Characters / ArpeggioOfBlueSteel

* PeekABangs: One of her Mental Models has her left eye covered by her hair.

* BareYourMidriff: Her original, pre-sinking outfit in the manga was a BadassLongcoat and matching business suit which only buttoned from the collar to her sternum, leaving her midriff in full view. Her outfit in the anime (pictured), despite being more revealing elsewhere, only had a thin strip of skin showing between her trousers and shirt top.

[[caption-width-right:200:The will be ORDER, even if she has to kill everyone else to get it.]]

The main characters. On paper, an [[Main/PrivateMilitaryContractors independent firm]] that also does some work for the Japanese government, at the beginning of the series Blue Steel is the only force that has a real chance at striking back against the Fog Fleet blockade of the Japanese islands. They are eventually hired by the Central government to deliver the blueprint of a weapon that might finally turn the tide in humanity's war against the Fog to the only country still capable of producing it in the numbers needed: the United States of America.

Commanded by Gunzou Chihaya, and manned by some of his classmates from the Maritime Institute, Blue Steel's ability to fight the Fog Fleet on (somewhat) even terms is mostly due to the fact that it has its own Fog ship under its disposal: the renegade Fog submarine I-401, Iona, who follows Gunzou for reasons even she herself isn't quite sure of.

* {{Gainaxing}}: Usually underplayed but she has some of the most motion of the cast (only behind Takao in ''Cadenza'').

* HotScientist: Presents herself as one with her mental model, complete with...

* ShesGotLegs: More prominently displayed in some of the [[https://static.tvtropes.org/pmwiki/pub/images/takaoarpeggio_498.png anime artwork.]]

* ShesGotLegs: The art rarely misses an opportunity to show them off.

* ShesGotLegs: It's not noticeable at first, but her geisha Mental Model shows off her long slender legs when sitting down.

* TalkingToHerself: With her other triplet sisters in the drama CD. In the anime, each of the 400-series subs has their own voice actress.

* CryCute: When her coat is taken away, and when consoling with Makie.

* CryCute: When Zordan orders her to cancel her mental model.

* IHaveTheHighGround: I-400 prefers observing Haruna and company from rooftops and other elevated vantage points.

* NiceHat: In the manga, she owns an astrakhan, while in ''Cadenza'' she wears a black mohair beret with a black rose pinned to one side.

* MoreDakka: It's clear that the Fog like this trope, but she likes to take it to a ''[[UpToEleven to a completely different level]]''.

* SingleMindedTwins: Like Nagato, Mutsu has two Mental Models that have the same personality with identical clothing.

* {{Qipao}}: Wears a shirt styled after one.

* RapunzelHair: She has waist-length hair.

* RapunzelHair: Though it is not directly visible because her ponytail is usually put up in a complex corkscrew when loose her hair reaches her ankles.

* HimeCut: Modified by her usual style of tying her hair into the distinctive 'puffball' pigtails. After activating her Flagship equipment, she lets her hair down (and [[RapunzelHair grows it out]]) for the full effect.

* WhoWearsShortShorts: Her outfit for ''Cadenza'', combined with the obligatory ZettaiRyouiki.

The current sonar operator of I-401 replaying Hibiki after she left. She plays a crucial role in locating various hazards outside the sub via sonar. Notable in being the only member to not have a naval background but an army background, although that aspect is currently unknown.

* SingleMindedTwins: Averted. Unlike Nagato, Mutsu, and Bismarck, Yamato's two Mental Models display distinct personalities, with one acting like a prim and proper princess, and the other [[spoiler:acting exactly like Gunzou's dead childhood friend Kotono Amaha, likely because she ''is'' Kotono Amaha]].

** ChildhoodFriendRomance: She wants to pursue this with Gunzou, but either he did not notice or didn't acknowledge her obvious affections for him, much to her frustration.
* CynicismCatalyst: Her death was the prime motivator for Gunzo to change the status quo of the world, and ally with Iona.

* IdenticalStranger: She has the exact same appearance as Yamato's Mental Model. [[spoiler: This is because Yamato copied her appearance to create her first Mental Model. The fact that Kotono has 'normal' eyes when all the other Mental Models have lens-like eyes is the biggest hint.]]

* {{Meganekko}}

* YouGottaHaveBlueHair: She has blue hair.

* YouGottaHaveBlueHair: She has light purple hair.

* YouGottaHaveBlueHair: She has lime green hair.

* {{Meganekko}}: Wears a thick pair of glasses which she takes off several times.

* {{Meganekko}}

* {{Meganekko}}

* MulticolouredHair: Her hair is predominantly black with red accents at the ends. She also has two bangs that are red in color.

* CanNotSpitItOut: Attempted to make a love confession to Gunzou... and [[SugarWiki/FunnyMoments failed miserably]].

-> Voiced By: Sayuri Hara.

-> Voiced By: Ayaka Fukuhara

* LabcoatOfScienceAndMedicine: Her signature style. It doubles as a BadassLongcoat and since it's made of nanomaterial she can alter how long it is, which she does [[http://mangafox.me/manga/aoki_hagane_no_arpeggio/v06/c034/12.html purely for dramatic effect]].

* TheGraphShowsTheTrend: He loves them.* MrExposition: Particularly in the early chapters as [[AsYouKnow briefings to the other crew]] so the reader can familiarize themselves with some of the terminology and concepts used in the rest of the series.

* RedEyesTakeWarning

* TheStoic
* TheStrategist

* {{Expy}}: To ''VideoGame/KantaiCollection'''s Shimakaze, of all people, in the ''Ars Nova Cadenza'' movie.

* ZettaiRyouiki: A solid Type A.