Shizuku Kurogane/History

History
Ikki's younger sister, and as a child, Shizuku is the only family member of Ikki other than Ryouma to have never discriminated against him nor was she aware that her brother is being discriminated by her family, resulting in their close relationship.

After Ikki left the house, Shizuku was shocked and sadden over her ignorance to see her family showing no concern over Ikki leaving as he was viewed as non-existing to them. This event eventually resulted in Shizuku hating and distrusting other people and her extreme attachment towards Ikki.

It is later revealed that Shizuku had always had a distaste for humans, ever since she was a child, as they would usually bend to power, as she would usually get away with anything she did because the adults used their power to make it so. This however eventually led to her first time meeting Ikki as he was the first actual human to not bend to adult power, and told her what she did was wrong.

New Term and Rebellion
Shizuku, on her first day at Hagun Academy, is first seen embracing her brother lovingly, kissing him in front of everyone much to the shock of everyone present with Stella stepping in to keep Shizuku away from Ikki. Shizuku disliking the interference proceeds to argue with Stella and was shocked to learn that Stella is Ikki's "slave". Denying the fact, Shizuku brings out her Device and fights Stella as they ended up destroying the entire classroom, which caused them both to be placed under house arrest for 1 week.

Following that incident, Shizuku is seen in her room with her roommate Nagi Arisuin, nicknamed Alice. Alice comforts her and helps her with her makeover for her outing with Ikki. She then invites him along, as the outing was already ruined with Stella inviting herself, and Alice would be able to give her support when needed. The next day, Shizuku shows up with Alice, meeting Ikki and Stella who were waiting for them. Shizuku then heads to the mall with them. As the four of them walks around the mall while waiting for their movie to start. Shizuku is then left alone with Stella, when Ikki and Alice went to the bathroom until Rebellion shows up.

Shizuku is next seen with Stella, being used as hostages, with the other hostages. When Stella stands up to protect a woman and her child, Shizuku proceeds to make her preparation in making a barrier, messaging her brother and Nagi beforehand as Shizuku signals the counterattack by activating her Noble Art, allowing Ikki to make his move and defeat Bishou. Shizuku is then asked by Ikki to heal Bishou as he will probably bleed out. Shizuku agrees but is interrupted by a member of Rebellion, who was hiding in the crowd with a hostage at hand. Now with the advantage, Bishou tried forcing Shizuku to heal her. This, however, became void, as Bishou and the Rebellion member is shot down, by Shizuya Kirihara.

Debut Battle
One night after the Rebellion incident, Shizuku enters her first Selection Battle being victorious. She was then seen cheering for Ikki during his match against Kirihara. When Ikki was taken to the hospital for emergency aid, Shizuku decides to stay behind to allow Ikki and Stella to have their own private time.

Lorelei vs Raikiri
Two days after Ikki is victorious against Kuraudo, Shizuku learns about her next opponent for the selection battles, Tohka Todo. She then goes to the training grounds, of the school, where she defeats fifty opponents with ease, not having much of a challenge against them.

Shizuku then goes to the arena, where she faces the strongest knight in the entire school, Tohka Todo. Shizuku tries to fight Tohka through strategy and cunning, and although gallant, her efforts were for not as she was easily overpowered by Tohka and her Noble Art Raikiri. Shizuku then wakes up in the infirmary. She is then hugged by Alice, who tells her that her brother was proud of her efforts. With the frustration of losing the match and hearing what Nagi said, Shizuku begins to cry, while holding onto Alice tightly.

Siege and End of Selection Battles
Shizuku is then seen in the student council room, after being invited by Tohka, talking with Tohka, who wanted Shizuku to convince her brother, Ikki, not to fight in their battle tomorrow, knowing how injured he will be. Shizuku had decided to not answer, wanting the night to think it over.

Shizuku is then seen greeting her brother at the gate and tells him that, although she is against him continuing to fight, she knows that him fighting against Tohka would be best for him, encouraging him to keep on fighting instead. She then sits in the stands, with Stella, cheering for Ikki even though she is scared at the possibility of her brother dying in this battle. When Ikki wins, Shizuku is still frozen and unable to go congratulate her brother after his victory.

Training Camp
Shizuku helps in the healing with the training camp, during the training camp for the Seven Stars Sword Art Festival. During the night of the final day, Shizuku and Alice share a drink and Shizuku points out that this is the first time Alice has actually opened up to anybody, much to Alice's surprise.

Akatsuki Strikes
Shizuku while on the bus back to Hagun, along with the participants for the festival, learns that Alice is an assassin for Akatsuki. Shizuku points out that it doesn't make any sense for Nagi to reveal himself now, leading to others to believe in him. When they arrive to a destroyed Hagun Academy, they are able to defeat the invading Akatsuki members. Alice is then struck by Amane Shinomiya and then it is revealed that the Akatsuki members they had struck down weren't the real ones but instead, wooden puppets made by Sara Bloodlily. Shizuku and Ikki chase after Reisen Hiraga who has taken Nagi's unconscious body to Akatsuki Academy.

Shizuku leaves Ikki to fight against an unknown powerful swordsman, as she confronts the "One-Armed Swordsman" Wallenstein. Shizuku is outmatched for most of the fight and Wallenstein is able to actually cut her in half. However, Shizuku reveals her new Noble Art, Aoiro Rinne, which allows her to turn her very being into the water, and is even able to manipulate the air that Wallenstein breathed, causing him to drown. She then finishes Wallenstein by destroying his very insides, saving Alice from a terrible fate.

After the incident, Shizuku learns the some of Hagun Academy's representatives for the Seven Stars Sword Art Festival had dropped out. She is offered a chance to participate and she accepts, becoming one of Hagun's representatives alongside Ikki and Stella.

National Powerhouses
Shizuku joins her brother in a party, which is held for the participants of the Seven Stars Sword Art Festival. There she meets two Akatsuki members Sara and Rinna, who seem both a bit too weird for Shizuku to actually consider to be terrorists. After the two have left the party Shizuku and Ikki are then met with Yui Tatara, who is someone with malicious intentions. This is proven as Shizuku is nearly harmed by Yui who tried to feed her meat with shaving razors in it, but she is saved by Ikki. A confrontation does not happen as other representatives intervene, causing Yui to leave in disgrace.

Shizuku, Ikki, and Alice are then invited to lunch by Yuudai, the Seven Stars Sword King himself. There they meet Kiriko, one of the participants in the tournament, who joined them for lunch. After lunch, Ikki is separated from the group leaving Alice, Shizuku, and Kiriko. Shizuku is confident that her brother will beat Yuudai but Kiriko disagrees and explains to Shizuku her reasons.

First Round Matches
Shizuku and Alice are seen cheering for Ikki from the stands. Kiriko then meets with them, telling them that Ikki seems nervous, causing Shizuku to remember what Kiriko had said to them, being that Yuudai is fighting for his little sister, who is unable to speak because of an accident she believes to have caused. Shizuku at the start of the battle becomes worried that Ikki is not going to win. However, the tide of battle soon changes causing Yuudai's little sister to leave, not being able to bare seeing her brother in pain. Shizuku chases after her and meets her in the hall, convincing her that she needs to be strong for her brother causing Koume, Yuudai's little sister, to come back and watch her brother. Shizuku then cheers as her brother is able to defeat Yuudai once and for all.

Shizuku later watches Stella's match against the rest of the Block B participants. Stella wins the match, which leaves Shizuku impressed, although she doesn't admit it. After Stella's match, Amane Shinomiya approaches Shizuku, Ikki, Alice, and Kiriko. He tries approaching Ikki, but Shizuku stops him, telling him that Ikki doesn't like Amane. Kiriko who is supposed to fight Amane is then forced to withdraw from the tournament, due to her patients entering the critical condition. This is revealed being caused by Amane's Noble Art, Nameless Glory. Shizuku also wins her match, although it's not shown.

Second Round Matches
Shizuku later fights against Momiji Asagi in the second round of the tournament. Momiji uses Trackless Step, which makes her undetectable by Shizuku. Shizuku though counters the Trackless Step by spreading extremely thin water across the arena, through which she can sense Momiji's movements. This allows Shizuku to defeat Momiji, leading to her advancing into the quarter-finals, where she will fight Amane.

Shopping Break
Shizuku, along with Ikki, Stella, Nagi and the Akatsuki member Sara Bloodlily, later go shopping. While they are shopping, Shizuku helps Stella in picking an outfit that will appeal to Ikki, claiming that she actually wants to support her now. However, Shizuku picks her a bunny costume, which Ikki doesn't approve of. Realizing that Shizuku tricked her, Stella quickly leaves to change while Shizuku leaves with Alice in order to prepare for her match against Amane.

Shizuku later tells Nagi about her plan to defeat Amane. She is planning to attack Amane before the start of their match. This will leave Shizuku disqualified, but it should leave Amane unable to fight in the rest of the tournament. Alice agrees to help Shizuku in her plan, as she is his friend.

Third Round Matches
Shizuku and Alice attack Amane in the waiting room. Shizuku pierces Amane's body with multiple icicles. Amane though survives this, which leads to Alice trying to use his Shadow Bind to bind Amane. Just then the lights in the room temporarily go out, making Nagi's shadow abilities useless. Amane then pierces his body with multiple swords.

The enraged Shizuku then attacks Amane, but is unable to hit him, due to Amane's Nameless Glory. Amane then pierces Shizuku with multiple swords. Then a camera in the room starts to broadcast footage of the beaten Shizuku, and Amane reveals to everyone her love for Ikki. Shizuku is saved by Stella, who also makes Amane stop. Due to her actions, Shizuku is disqualified from the Festival, and Amane advances into the semi-finals, where he will face Ikki.

Semi-Finals
Shizuku and Alice later recover from their injuries and watch the match between Amane and Ikki, which Ikki wins. Despite this, Ikki is almost killed by the deadly effects of Nameless Glory after the match is over, but he is saved by Kiriko Yakushi.

The Final Match
Shizuku later watches the finals of the Seven Stars Sword Art Festival, where Ikki faces Stella. After a long and hard battle, Ikki finally wins, which leads to him becoming the winner of the Festival.

The End of the Festival
Shizuku later meets Stella and Ikki in the hospital room the morning after. Shizuku realizes that Ikki and Stella had sex last night and so furiously attacks Stella. Shizuku is later present during the crowning of Ikki as the new Seven Stars Sword King.

Post-Festival Meeting
Shizuku later participates in the party after the tournament. She tells Alice that she plans to go to Kiriko's place during the summer break to learn healing techniques. She also goes to the bathhouse, along with the rest of the females in the party.

Becoming Kiriko Yakushi's Disciple
Shizuku later visits the Yakushi General Hospital and meets Kiriko Yakushi. Shizuku asks her if she can teach her healing techniques, to which Kiriko agrees on one condition. The condition is that Kiriko can give Shizuku treatment because her body has become distorted from using Aoiro Rinne. Shizuku agrees to get treatment, despite Kiriko informing her that the treatment will be very painful. Kiriko then begins her treatment of Shizuku.