Sena Aoi

Sena Aoi (蒼井 セナ, Aoi Sena) is a senior at Suimei Academy and a Gigalomaniac who goes around in public with her DI-Sword.
==Appearance==
Sena has waist-length silky black hair and almond-shaped purplish eyes.
She is usually seen in her school uniform which consists of a purple plaid skirt, purple plaid tie, a beige blazer with a white long sleeve button shirt underneath, and black dress shoes with black knee socks. On the rare instances when she is not seen in her uniform, she wears a white summer dress with a black ribbon tied around her waist.
She is often seen with her DI-sword or eating a blue popsicle. While she is attractive, she is also very intimidating and almost always has a stern look.
==Personality==
Sena is hostile, unfriendly, and aggressive, likes to eat blue “Crunchy-kun” popsicles and gets very irritated if someone takes the last one, tries to put on a tough girl act, fears any kind of dog, despises Takumi Nishijou, and loves her mother and sister dearly. She hates her father with a passion and wants to track him down and kill him. 
It later turns out that while Sena despises Issei Hatano, she still cares for him and loves him as a father. For example, when sleep talking she calls him "dad" while crying, instead of like usual by his name. When he later gets killed protecting Sena from a bullet in Chapter 10 and dies in the Sena route, she weeps for him. In the Crying Sky ending (or B ending in the original ChäoS;HEAd), when she accidentally kills her father, even though it had been her plan since the very beginning she suddenly finds herself in a severe state of shock and cradles his chopped off head in her arms while laughing, her mind broken.
She feels tremendous guilt over feeling disgusted by her sister Mana's corpse and by watching her mother die, a feeling she tried to shove away by solely focusing on despising her father and blaming him for their deaths. In the Sena route, she admits that she had only begun thinking of the world as a giant eletronic device to get rid of her own emotions.
==DI-Sword==
==Background==
When she was fifteen, her mother was about to give birth. Her father, the researcher Issei Hatano, decided to volunteer his wife for the prototesting of Noah II and sent Sena to live in the psychiatric hospital Ark Heart Medical. With the help of Noah II, what his wife saw was her happy newborn child, Mana, and a pleasant daily life that she thought was given her by her husband’s company, N.O.Z.O.M.I. She lived alone with the baby, as she had been told that her husband had moved for his job along with their elder daughter. She was assisted in her life by a “neighbor” and a “housemaid” who looked after her, and made it possible for her to stay inside all the time with her baby. She and Mana were very attached, and they spent all their time together.
Two years passed, and the end of the experiment drew near. The scientist begged for it to be continued, but N.O.Z.O.M.I. already had all the data they needed and had therefore no need for a continuation. The reality of what had taken place over the last two years weighed heavily on his heart. Just one month after Mana’s birth, she died suddenly. Sena's father tried to stop the experiment, but the company thought of this as the perfect conditions to test Noah II. Sena’s mother looked after the corpse of her daughter for two years, thinking she was still alive.
When they turned off Noah II in the May of 2008/2009, she saw that Mana had been mummified, and the stench from her was overwhelming. As she looked at Mana, her heart broke. She devoured Mana, and then began banging her head into the wall before digging out her eyes. Finally, she stabbed a kitchen knife in her eyes and died, all of which Sena witnessed from behind glass. Sena screamed in shock and despair and vomited out of disgust. Following that, she ran away from Ark Heart Medical, changed her surname from Hatano (波多野) to her mother's maiden name, Aoi (蒼井), and proceeded to hunt her father down in the months that followed to enact revenge.
==Plot==
== Quotes==
*"Ignorance is a sin. People claim 'ignorance is bliss', but that's simply naive. Doubt the world. Study its mechanisms. This world is imperfect. ...Is the scenery your eyes perceive truly real?" — Sena's warning to Takumi Nishijou.ChäoS;HEAd (visual novel) & ChäoS;HEAd NoAH — Chapter 4
==Trivia==
* Sena likes science and “Crunchy-kun” popsicles (「ガルガリ君」, “Garugari-kun”; a certain brand of ice popsicles), but dislikes and is afraid of dogs.
* Sena's birthstone is the aquamarine.
* During her spare time, Sena likes reading in bookstores.
===Etymology===
* Sena’s surname Aoi means “blue, pale” (蒼, ao) and “well, well crib, town, community” (井, i).蒼井 - Jisho.org
* Sena’s previous surname Hatano means “waves, billows, Poland” (波, ha), “many, frequent, much” (多, ta) and “plains, field, rustic, civilian life” (野, no).波多野 - Jisho.org
==Gallery==
Sena1.png|Showing her DI-sword.
Sena2.fw.png|Destroying the backpack of a porter.
Group Photo.png|Commemorative group photo of Sena, Takumi Nishijou and Kozue Orihara.
Sena in a positive delusion.png|Shoving her foot at Takumi Nishijou's face in a positive delusion.
Rimi deflecting.png|Rimi deflecting Sena's strike.
Sena and Takumi under rubble.png|Trapped under rubble in N.O.Z.O.M.I. building in her route.
Sena holding a baby.png|Holding the "cheat code" in her route.
Birthday 2023-03-08 Aoi Sena.jpg|Graphic from Sena's official birthday post in 2023.@kagakuadv: Sena's birthday's tweet on Twitter (2023)
==References==
==Navigation==
Category:Main Characters
Category:Female Characters
Category:Gigalomaniacs