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Characters / Sword Art Online Alfheim Online

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Real world names are in western naming order. Followed by their online name and worlds they played in.note 

This page details the various characters and NPCs first appearing in the server known as Alfheim Online (ALO for short); this includes characters from Fairy Dance, Calibur and Mother's Rosario.


Note: Unmarked spoilers ahead.note  If you're starting the anime, do not read this page!

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Introduced in Fairy Dance

    Shinichi Nagata / Recon 

Shinichi Nagata / Recon (ALO)

Voiced by: Ayumu Murase (Japanese), Marianne Miller (English), José Luis Piedra (Latin American Spanish), Jorge Tejedor (European Spanish)
Click here to see Recon 

Suguha's real-life friend and classmate who introduced her to ALO.

  • Dogged Nice Guy: He tends to be nice to Suguha in an attempt to win her over, albeit to the point of obnoxiousness and with a small amount of stalking involved.
  • Heroic Sacrifice: He uses a self-destruct spell to help Kirito on his second attempt at the World Tree grand quest. Sure, he didn't really die but the EXP penalty for using this spell is much greater than standard deaths so it still counts.


Sakuya (ALO)

Voiced by: Sayuri Yahagi (Japanese), Lauren Landa (English), Kerygma Flores (Latin American Spanish), Rosa López (European Spanish)

Guild Leader of the Sylphs in ALO.

    Alicia Rue 

Alicia Rue (ALO)

Voiced by: Chiwa Saito (Japanese), Cristina Valenzuela (English), Erika Langarica (Latin American Spanish), Silvia Cabrera (European Spanish)

Guild Leader of the Cat Siths in ALO.



Sigurd (ALO)

Voiced by: Takuya Kirimoto (Japanese), Arturo Mercado Jr. (Latin American Spanish)

A prominent member of the Sylphs, who's also a traitor.

  • Defeat Means Friendship: He recruited Leafa for his party after losing to her in a tournament. However, Recon says that he didn't do this out of friendship but rather to save face. On the contrary, he sees her as a possession.
  • Disproportionate Retribution: He tries to kill Kirito for seemingly poaching Leafa from his group.
  • Jerkass: He often pushes Leafa around and disregards the agreement she made with him to associate with him when she chooses to.
  • Kick the Dog: When Kirito stands up for Leafa, Sigurd threatens to kill him in the middle of Sylph territory, where Kirito, as a Spriggan, can't fight back. Thankfully, the fact that people are watching causes Sigurd to reconsider.
  • Laser-Guided Karma: He was disgusted by the Sylphs and wanted to leave the race, so Sakuya grants him his wish and exiles him as a renegade.
  • The Mole: He sells out the Sylphs in the hopes of rerolling as a Salamander for the next patch, in which they're set to be in a favored position.
  • Pragmatic Villainy: While he's short-tempered and vengeful, he backs down on killing a defenseless player when an underling points out that there are people watching.
  • Rewarded as a Traitor Deserves: Sakuya suggests that this would have happened to him if his plan had worked out, since Mortimer is unlikely to have kept his promise.
  • Smug Snake: He's arrogant, overconfident in his abilities and doesn't even seem to regard those he's collaborating with well, possibly being unaware that they intend to discard him once he's no longer useful.
  • Villainous Breakdown: He has one when the still very much alive Sakuya contacts him to inform him that his plan has failed, and banishes him from the Sylphs.
  • You Gotta Have Blue Hair: His ALO Avatar has dark green hair.


Eugene (ALO)

Voiced by: Kenta Miyake (Japanese), Humberto Solórzano (Latin American Spanish)

A powerful warrior among the Salamanders, and the brother of their leader, Mortimer.

  • Affably Evil: Is fairly polite and genuinely respects Kirito for both his courage and his fighting ability, and then it's revealed he's not such a bad person after all.
  • Big-Bad Ensemble: He and the Salamanders provide the second biggest threat to Kirito and Leafa during the Fairy Dance arc, forcing Kirito to sidetrack his plans to rescue Asuna to deal with them.
  • Brains and Brawn: He's the Brawn to Mortimer's Brain. Even considering Kirito has the stats gained from his time in SAO, Eugene gives him a difficult battle in their one-on-one duel.
  • The Bus Came Back: He makes a return in Ordinal Scale after being since the Fairy Dance arc.
  • Defeat Means Friendship: He and Kirito part on good terms after their duel, with Eugene coming to respect him and seeing him as a Worthy Opponent. In Ordinal Scale, he's even among the allies who arrive to help fight the Floor 100 Boss.
  • Good All Along: He was part of the Big-Bad Ensemble for the Fairy Dance arc, but Kirito comes to learn he's not such a bad person after all.
  • Infinity +1 Sword: He owns the Demonic Sword Gram, a powerful sword which has the power to phase through an opponent's sword, negating most defenses.
  • Kill It with Fire: As a Salamander, he uses various fire-related moves.
  • Sibling Yin-Yang: With Mortimer, who's described as more of a tactician than a warrior.
  • Signature Move: He possesses an Original Sword Skill that's an eight hit combo.
  • Strong and Skilled: Was said to be (at the time) the World's Best Warrior of ALO. It is noted that he's as equally skilled and strong as Kirito during their duel, however he's able to gain the advantage with his superior equipment. It takes Kirito using several sneaky tacticsnote  for Kirito to be victorious.
  • World's Best Warrior: Before Kirito and Yuuki showed up, he was regarded as the best player.
  • Worthy Opponent: Comes to see Kirito as this after losing their duel. Not many people in ALO can match him.

Introduced in Calibur


Urðr (ALO)

Voiced by: Houko Kuwashima (Japanese), Karen Strassman (English)

An NPC who is based on the Norse God.

  • Artificial Intelligence: She's more intelligent than the standard NPCs and does not have a fixed response routine, being capable of holding a much more sophisticated conversation.
  • Big Bad: In Memory Defrag she's actually made into this for the Divine Objects story event, being the one who sent the gang on the quest to retrieve the Divine Objects.
  • Big Good: Provides the quest that is crucial in saving ALO.
  • Giant Woman: She's one of the three Hill Giant sisters.
  • Physical God: Based on the goddess from Norse Mythology.
  • Quest Giver: Provides the gang with the quest to retrieve Excalibur.
  • Spell My Name with an "S": Her name is inconsistently spelled Urðr, Urd, or Urdr across media.

    Thor / Freyja 

Thor / Freyja (ALO)

Voiced by: Yuko Minaguchi (Freyja, Japanese), Mela Lee (Freyja, English), Tessho Genda (Thor, Japanese), Richard Epcar (Thor, English)

An NPC companion who shows up in the Excalibur quest. Initially appeared to be the goddess Freyja before being revealed to be a disguised Thor.

  • Adaptational Wimp: Unlike in the original myths, Thor gets caught while trying to steal back Mjölnir while disguised as Freyja.
  • Badass Beard: He wouldn't be Thor without his facial hair.
  • Brain Bleach: Thor the God of Thunder disguised himself as the beautiful Freyja, whom Klein had a crush on. Poor Klein is left quite unsettled by the revelation.
  • Crutch Character: Upon revealing himself to be Thor, he completely turns the tide of the battle against Thrym.
  • Damsel in Distress: As Freyja, she presented herself as one to the Heroes of Aincrad. She was chained up in a cage and beseeched them to free her. It was only later that he revealed himself to be a disguised Thor.
  • Drop the Hammer: As per the norm with Thor, he wields Mjölnir.
  • Five-Second Foreshadowing: Kirito struggles to move Mjölnir when he finds it and it is only with great effort that he flings it over to Frejya. "She" effortlessly holds it in one hand before transforming. Only Thor is worthy of Mjölnir.
  • Gender Bender: He disguised himself as Freyja and posed as Thrym's wife.
  • Irony: While appearing as Freyja and trapped in a cage, Klein is adamant about helping her, to which all of his friends bluntly tell him it's a trap. Technically they're not wrong, only they didn't realize it's the other kind of trap.
  • Monochromatic Eyes: As Thor his pupils are not visible.
  • Physical God: Based on the Thor of Norse Mythology. He is huge and powerful, single-handedly turning the battle against Thrym in the heroes' favor.
  • Shock and Awe: Given it's Thor, of course he can command thunder and lightning. Though he could use it even while disguised as Freyja.

Introduced in Mother's Rosario

The Sleeping Knights

    In General 
A guild led by Yuuki who aim to beat a boss in ALO and earn their place in the highscores.
  • Badass Crew: They beat a Boss using only seven players, making them simultaneously one of the strongest and smallest guilds in ALO.
  • The Bus Came Back: The remaining Sleeping Knights reappear in Ordinal Scale. It's revealed they didn't disband their guild as they had originally planned and are still playing ALO.
  • Damager, Healer, Tank: Yuuki, Talken and Nori are Damagers, Siune is the Healer, Jun and Techi are Tanks. When Asuna joins she also takes up being a Healer but frequently switches to Damager.
  • Dwindling Party: Their numbers plummet as each of their illness claim their lives.
  • Gender-Equal Ensemble: The group has thee girls- Yuuki, Siune and Nori- and three guys- Jun, Tecchi and Talken.
  • Guest-Star Party Member: Asuna is recruited by them, however she never officially joins their guild due to it disbanding shortly afterwards.
  • Ill Girl: All of them are chronically ill, with their members dwindling as their illnesses claim them one by one.
  • True Companions: The Sleeping Knights treat each other like family.
  • You Are in Command Now: Yuuki's twin sister, Ran, was the original leader of the guild. However she passed away and leadership was given to Yuuki.
  • Your Days Are Numbered: Several of them are terminally ill with only months to live. Yuuki succumbs to AIDs and passes away by the end of the arc.

    Yuuki Konno / Yuuki 

    Shi-eun Ahn / Siune 

Shi-eun Ahn / Siune (ALO)

Voiced by: Yu Shimamura (Japanese), Erika Harlacher (English), Alejandria de los Santos (Latin American Spanish)

The second-in-command of the Sleeping Knights.

  • Bald Women: In real life, as a result of her battle with leukemia. Asuna notices that she's wearing a wig when they meet in person.
  • Image Song: Sleepless Legend (along with Asuna, Yuuki and the rest of the Sleeping Knights)
  • Survivor Guilt: She feels upset that she's going to significantly outlive Yuuki, Ran, Merida and Clovis, but Asuna comforts her.
  • The Medic: She's noted to be the Sleeping Knights' primary healer before Asuna comes since she plays an Undine.
  • Number Two: To Yuuki, after Ran's death.
  • You Gotta Have Blue Hair: Her ALO Avatar has light blue hair.

Introduced in Girls Ops

    Hiyori Kashiwazaka / Kuro / Lux 

Hiyori Kashiwazaka / Kuro (ALO) / Lux (SAO, ALO)

Voiced by: Chinatsu Akasaki
Click here to see Kuro 
Click here to see Lux in RL 

A young girl and SAO survivor that Silica, Lisbeth, and Leafa first meet in New Aincrad and main character of the Girls Ops spinoff manga. Silica and co. First meet her in the midst of the quest Angel's Whisper Rings.

She also appears as a DLC playable character in Lost Song, where she is voiced by Chinatsu Akasaki.

  • Ascended Fangirl: In Lost Song she get to be rescued by her hero Kirito when she's in trouble.
  • Black Swords Are Better: As Kuro, one of her swords was black to help simulate Kirito. After converting to ALO as Lux she is given a new sword by Lisbeth that is also black.
  • Dark and Troubled Past: When she meets Silica and co. her time in SAO has become this. In SAO while separated from a temporary party, she was saved from death by Laughing Coffin and forced to choose between joining them or risk death in the dungeon, and forced to join as a green intelligence agent to survive. During which she befriended Gwen, the leader of an orange subordinate guild of Laughing Coffin guild, out of a desire to have someone close to despite simply joining only to survive. Eventually when Laughing Coffin was purged by the clearing group she was spared as it was believed by those that found her and Gwen that she was a hostage. Gwen escaped from those that sought to capture her but left a parting message and left revoking their status as friends. After the incident she did her best to lay low with the only person who she interacted with being a girl named Rossa who perished protecting her, after which she began avoiding others all over again not wanting to lose anyone else.
  • Distaff Counterpart: Visually she's quite literally meant to be a female Kirito, which is ironic considering at the same time she showed up, Kirito was busy in GGO using a girly-looking avatar.
  • The Ditz: She has some tendencies of this in the omakes, such as how she realized she got Kirito's swords in the wrong hands because she was looking in a mirror when she did it.
  • Dual Wielding: As Kuro, she wields dual swords in order to imitate Kirito, whom she greatly admires. Using her left sword to parry and imitating One-Handed Sword Skills that she used in Aincrad. As Lux she later replaces wielding a second sword with a white dagger she receives from Silica.
  • Hero-Worshipper: Towards Kirito. Who she looks up to as a model for independent strength.
  • Identical Stranger: As Kuro, her avatar looks pretty much identical to Kirito. This was intentional on her part, as after noticing how her auto-generated ALO avatar's resemblance to Kirito, she decided to wear black clothes and wield two swords much like her idol.
  • Mark of Shame: Had the Laughing Coffin tattoo carved onto her leg. Even with it now gone, she doesn't like baring where it was due to the memory of it.
  • My Greatest Failure: Joining Laughing Coffin out of a desire to live and the death of Rossa.
  • Samus Is a Girl: When she first meets Silica and co. as Kuro she is at first mistaken for a boy due to her avatar resembling Kirito.

Introduced in Sister's Prayer

    Aiko Konno / Ran 

Aiko Konno / Ran (ALO)

Yuuki's older twin sister.


Merida (ALO)

A friend of the Konno sisters, a founding member of the Sleeping Knights, and an SAO beta tester who was unable to participate in the final game due to a brain tumor, which eventually led to her death.

  • Death Seeker: Since she has a tumor that has a 70 percent chance of killing her, she believes that if she's going to die soon, she should go back to SAO and risk her life to help her friends. Thankfully, Yuuki talks her out of it.
  • Don't Call Me "Sir": She insists that the Konno sisters don't need to use "-san" on her, since she isn't that much older than they are.
  • Ill Girl: She has a brain tumor.
  • Ninja: Her Prestige Class in Asuka Online is styled stealth and such skills.
  • Posthumous Character: She died of her tumor around the same time Ran died.

Example of: