Nanairo Arshavin

Seven (セブン) is a new game-original character featured in the game adaptation Sword Art Online: Lost Song. Seven's ALfheim Online (ALO) avatar is a Pooka, a type of fairy who uses songs to boost her allies' stats in battle. Her in-game weapon is a large staff that she wields with both hands.

Her real-life name is Professor Nanairo Alsharvin (アルシャービン).

Background
In her early childhood, Nanairo Alsharvin was the younger sister of Karatachi Nijika (Rain), and they lived together in their home in Russia. It was from her older sister that Nanairo learned many of the greeting words she uses in the present. Since an early age, Nanairo displayed her genius and this caused her parents to argue about her future, which eventually led to their divorce. Using his authority, her father obtained custody over Nanairo, and took her to America, while Nijika returned to Japan with her mother. Until Nanairo, as Seven, later met Nijika, as Rain, after the game's main story, Nanairo remained unaware that she had an older sister and lived with her father, who made her pursue her capabilities as a genius.

On top of her real life career as a scientist, Seven presents herself as a idol singer in the virtual world, and her songs promote peace. According to her fans, she writes the lyrics to her own music.

In moments involving Kazuto and Suguha in the real world, while she is being interviewed on television, she revealed her admiration for the achievements Kayaba Akihiko made when he created Aincrad; however, she stated that this did not justify the incident he caused. When speaking alone with Kirito, she mentioned that she wanted to play Sword Art Online (SAO) but was not able to. Despite the crimes Kayaba had committed, she wanted to use his idea for virtual reality as a springboard for her own research, as she desired to see where the players of VRMMO games want virtual reality's future to be, despite the division of races in ALfheim Online.

Lost Song
Soon after Kirito and friends logged into ALO, which had recently been updated, word about Seven's popularity and fame spread throughout town. She was first spotted by Kirito and others when she and Sumeragi entered the town plaza and were immediately surrounded by fans, some begging to join Shamrock. Her cuteness eventually won over Klein, who become one of her fans as well.

Seven made her first major appearance in the story when she bumped into Kirito in town while trying to hide from Sumeragi, after the rest of his party logged out for the day. Seven started to seek out Kirito to talk with him more, all the while still being followed by her fellow Shamrock members and Sumeragi. When the two met at Agil's shop, Kirito asked Agil to keep the fact he met her a secret from the others for the time being. Seven and Kirito enjoyed talking with each other, and Kirito started to learn more about how her research stemmed from Akihiko's work with Aincrad.

When asked by Kirito if she knew Rain at the time she was dismissed from Shamrock, Seven claimed that she had not met her. Seven later made an appearance at Kirito's group's party after defeating the boss at Flosshilde, and Seven met Rain in person, lightly punishing her for her reasons for joining Shamrock via deception.

As Kirito's party continued clearing the game, eventually reaching Niflheim, the Dark World, he began questioning the kind of affection and loyalty Seven's fan club and the members of Shamrock give her. To see what kind of affect she has, the group attends one of Seven's concerts and discovers that her words seem to affect the viewers, making them motivated to complete her wishes. When Kirito's group manages to beat the boss outside the central tower and enters the final dungeon, they come across a empty room full of Remain Lights of fallen Shamrock and Seven fans, no doubt used as sacrifices for Seven's advancements. Kirito later meets Seven and Sumeragi after clearing the boss in the next room, apologizing for the unfair tactics her guild members used against them previously and wishes to speak with them at Agil's cafe.

When the parties arrive, Seven explains her reason for joining ALO: running tests on her latest creation, the Cloud Brain. Having gathered emotional data from the other players, the Cloud Brain was meant to unify the emotions of many players around one single point, essentially the same as what they witnessed at the concert. She then extends an invitation to join Shamrock to Kirito so they could clear the game and complete the final stages of the Cloud Brain. Despite being impressed with her songs and research, Kirito refuses the invitation as he would rather fight hard with his loyal friends would be the kind of way he wants to enjoy the game. Seeing as words would no longer work, Seven leaves, but not before telling Kirito that they'll be waiting for them in the final dungeon.

After defeating Sumeragi in a duel, Kirito arrives in the final boss' room, only to find Seven had already defeated it on her own. This is explained that she used the special badges given to the other Shamrock members, as well as her fans, to be able to transfer complete control of their OSS (Original Sword Skills) to her. Using these, she was able to slay the boss on her own, despite the majority of remaining players having fallen. Without any care for the state of her guild mates, she proclaimed that word of her accomplishments would be spread all across ALO as she proclaimed this to be the beginning of "Ragnarok's Pastoral". The thought of her only achieving victory through stealing her fellow guild mates experience angered Kirito. As she started to ponder about how the results of her experiment, which was being recorded by Sumeragi, would turn out, Rain lashed out and slapped Seven.

She was angered as well, assuming that her job as an idol was a joke as well, seeing as what she did to her allies. While she claims this is just a simple "business transaction" she was doing, Rain claimed she only got this far because the people who supported her were only spoiling her out of love. Despite her outbursts, Seven said she would not stop as her experiment would be finished and she would be recognized for it. This led to a battle breaking out between Kirito, Rain and Seven, who was armed with countless OSS at her disposal. Despite this giant advantage, Kirito's party still brought down Seven.

Following her defeat, she broke out into uncontrolled rage as she began claiming she would be the one who is worshipped for clearing Svart Alfheim and be worshipped as a goddess and also known as the one who defeated the "Hero of SAO". However, at that moment, Seven's avatar became corrupt and mutated from the stress of commanding so many OSS and transformed into a monstrous form, taking on Kirito's party one last time as the final boss. Throughout the fight, Seven's rage continued to grow as she was losing rational thought. However, as the fight continued, Rain became unwilling to fight as she realized Seven was merely throwing a tantrum now and could not hurt her anymore. The battle ends with Kirito's victory and Seven's avatar returned to normal.

Defeated and on the verge of losing her HP, Seven ultimately broke down and started bawling as she couldn't understand her failure. Sensing that it was the weight of expectation crashing down on her, Rain opened her arms and embraced Seven without a second thought, letting her cry to her heart's content. At the same time, uproars were beginning to spread as the video feed of Seven's activity flooded the forums. Eventually, Seven's avatar lost all her HP and her avatar disappeared.

Days later, following the event, not only had Seven all but stopped having concerts in ALO, but Shamrock's activity had all but halted as her fans began dwindling away, some even unwilling to help her put on concerts. Despite all that was going on, Seven returned to her normal cheerful self and became a regular at Agil's cafe and began hanging out with Kirito and the others.

After meeting Rain in real life, he put together a scheme to bring the sisters together again. After Kirito's duel with Rain, Seven arrives on the scene in time to learn the truth. Hearing everything Rain had to say, the memory of her childhood in Russia came flooding back as she recalled her older sister, embracing her once more. Kirito watched on as the separated sisters were happy to be reunited.

In a short post-game scene, Seven invites her older sister to come join her to perform on stage at one of her concerts. Despite having stage fright at first, Seven gave her older sister a mask to help ease her worries. The concert is a success as the fans approve of the sisters singing together, prompting Rain further to continue chasing after her dreams.

She joins the party for one final post-game event battle where the entire group heads to Niflheim to take on a new event quest boss. Throughout traversing the dungeon, a voice speaks to them telepathically, asking how the players made it to where they are today. Upon reaching the end, Rain and Seven both speak about how their lives have changed for the better after meeting Kirito and friends. The voice then introduces itself as "Lost Song", the most powerful event boss of the game. After defeating it, the group returns to Agil's cafe where Seven reveals Rain and her mother are coming to see her in America very soon. Completing the scene unlocks Seven as a playable party character.

Gallery

 * See Seven/Image Gallery

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