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"Playing 'hero' must be a fun way to pass the time..."
—Fairy Leviathan, Mega Man Zero Official Complete Works

Fairy Leviathan, known in Japanese as "Yōshō" Leviathan (「妖将」レヴィアタン 「Yōshō」Reviatan, Yōshō literally meaning Siren General), or simply Leviathan, is a member of the Four Guardians in the Mega Man Zero series. She serves as a secondary antagonist in the first two games, and is briefly a supporting character in Mega Man Zero 3.

Leviathan was created from X's DNA data to aid humans resettling the Earth after the destruction of the Elf Wars. She is a military general of Neo Arcadia, commanding the Deep Sea Squadron (冥海軍団 Meikai Gundan, literally "Army of the Dark Oceans"). She wields a spear called Frost Javelin (フロストジャベリン Furosuto Jaberin).

Leviathan lives on through Biometal Model L in the Mega Man ZX series.


Rockman X DiVE Leviathan concept art by Toru Tanakayama

Concept art detailing Leviathan's Mega Man Zero 3 redesign.

Like her siblings, Leviathan's armor is based on that of her biological origin, X, with thematic alterations. Her armor is colored blue, symbolizing her alignment with water and ice. Her helmet frames her face in such a manner as to resemble hair, with the sides forming the 'fringe' and a seashell motif forming the 'bangs'. The back is mounted with a long dorsal fin-like jet, which she uses to propel herself through bodies of water. She wields a harpoon-like Frost Javelin, the size of which she can alter, and she uses it to create ice and launch torpedoes. To highlight her femininity, Leviathan's torso armor resembles a female swimsuit, her gauntlets are long like opera gloves, and her boots have high heels.

Leviathan received a small redesign in Mega Man Zero 3, giving her large bangles on her wrists, more blue on her boots, and gold accents to her hips and shoulders. These changes are not depicted in her sprites.

In her Armed Phenomenon form, Leviathan's armor expands to become a submarine in the shape of a gigantic manta ray, becoming much more fitting of the name 'Leviathan'.


Fairy Leviathan is a playful, sadistic, and mischievous woman. She is easily bored, but takes pleasure in retiring Resistance soldiers to pass the time. She prefers to stay underwater, stating that land is "too dusty" for her. Like the other Four Guardians, she is deeply loyal to X and follows his every command.

Leviathan becomes obsessed with Zero as she fights him. She warns him not to hold back just because she's a woman, and is offended when he doesn't finish her off. She states that losing to Zero "drives her crazy". However, she also comes to enjoy that Zero is stronger than her, claiming she's been looking for a powerful Reploid to one day overcome. She also notes that fighting Omega isn't as fun as fighting Zero.


As a Reploid able to control the currents and water temperature, Leviathan has paired up with Harpuia before to execute large-scale projects aimed at helping humans re-populate habitable areas.

Meikai Army[]


At some point, Leviathan, along with her three siblings, became military generals of Neo Arcadia, responsible for the overall safely of Neo Arcadian habitants, both humans and Reploids. Leviathan, given her unrivaled superiority in the water, was appointed to become the leader of the Meikai Army, Neo Arcadia's navy forces. She commanded various water-type forces and Mutos Reploids. The Mutos Reploids Blizzack Staggroff and Poler Kamrous belonged to her forces.

Mega Man Zero[]

Leviathan first encounters Zero after he thwarts her attempts to hack into the Resistance Base (in the "Stop the Hacking" mission). Despite the fact that the battle with her (both in the mission and near the end in Neo Arcadia's Area X) is underwater, she is weak to Flame (because she is of the Ice Element). She later has a rematch against Zero, but after being defeated, fled the area. She does attempt, alongside Sage Harpuia and Fighting Fefnir, to prevent Zero's passage to Copy X, but were forced to stand down under Copy X's orders. Unlike her "brothers", she seemed to be compliant to Copy X's command of leaving him alone with Zero.

Mega Man Zero 2[]

Zero encounters Leviathan in the same Computer Zone that he fought Poler Kamrous, albeit in a different part of it. As before, the battle is underwater (Leviathan floods the room upon the start of battle), although the spike pits are removed. When going after Elpizo in Yggdrasil, Zero fights against Leviathan in her Armed Phenomenon form within the Temple of Ice, having been given a power boost from the Baby Elves Elpizo had with him, which increased her urge to fight Zero and awakened this form. Zero still manages to defeat her, and she leaves reluctantly.

Mega Man Zero 3[]

Leviathan took part in a mission to investigate the wreckage of a crashed spaceship that contained the exiled Reploid, Omega at the beginning of Mega Man Zero 3. She and Fefnir were heavily damaged in the battle with Omega.

Because of Dr. Weil's return as well as his constant orders to both the maintenance and medical teams, only three people were available to treat her and Fefnir. However, shortly after the transfer, they lost consciousness and were in critical condition, as they later told Harpuia. Harpuia later remarked to Copy X that "Fefnir and Leviathan are still undergoing repairs", but neither he nor them were allowed a chance at trying to capture the Dark Elf, due to Copy X demoting them and giving full command of Neo Arcadia's military to Dr. Weil. In one of the drama tracks from Remastered Tracks Rockman Zero Telos, the original X and Phantom appear to Fefnir and Leviathan and say they must help Zero defeat Omega and Dr. Weil. Leviathan, Harpuia, and Fefnir help Zero destroy Omega, and disappear in his massive explosion.

Like the other Four Guardians, Leviathan was not mentioned at all in Mega Man Zero 4 - this leaves the fates of Leviathan and her comrades unclear. Prior to the Japanese release of Zero 4, a blog entry on UCapcom stated that X and the Four Guardians were assisting humans outside Neo Arcadia in escaping Dr. Weil. Artwork featured in the Vile's Incident booklet also showed X and the Four Guardians watching the fall of Ragnarok in Cyber-elf-like robes. However, Mega Man Zero Official Complete Works instead stated the remaining three of the Four Guardians were killed in the explosion of Omega. This contradiction was addressed in the Q&A segment of MM25 Mega Man & Mega Man X Official Complete Works, where Takuya Aizu explained that Neo Arcadia had officially recorded the Four Guardians as deceased, but this didn't mean they weren't still secretly alive somewhere.

Mega Man ZX series[]

Leviathan doll in Area F
Biometal L

Model L

Main article: Model L

In Mega Man ZX, Leviathan makes a cameo appearance as a doll pulled by the giant crane in Area H-3.

Leviathan also makes an appearance in the Mega Man ZX series as Biometal Model L. Vent/Aile combines it with Model X so they can use it against Serpent. Model L further gives evidence that it is Leviathan as it holds respect for Model X and likes to exchange banter with Model Z, Zero reborn as a Biometal (once again indicating Leviathan's flirtyness).

In Mega Man ZX Advent, Model L is stolen and used by Thetis. It is suggested that Model L is working with him against its will, as Model L was made to stop Model W, and Thetis wanted to awaken it.

Powers and abilities[]

As a Reploid clone of the original X, Leviathan is an extremely powerful warrior in her own right. Leviathan is a powerful Reploid who manipulates the ice element and excels in underwater combat. While underwater, she's capable of swimming and maneuvering at high speeds, giving her an edge in battle; and, as an aquatic Reploid, she is capable of sustaining herself underwater for long periods of time (perhaps indefinitely). Being a skilled user of the ice element, she is capable of manipulating ice greatly to her advantage, particularly while underwater: she can produce a variety of attacks from her halberd/lance, such as raining down sharp icicles or creating ice dragons that lock on and follow targets; and she is capable of using the ice to give her strategic advantages, such creating blocks of ice or using her icicles to limit the movement of her enemies. Given this, it could be said that her fighting style is more indirect than the other three Guardians, as she tends to prefer attacking from a distance with her element than engaging in close range attacks with her weapon. Her EX Skill is to summon an ice dragon.


Attack Description Notes
Marine Snow (マリンスノー) Leviathan will swim across the top of the stage spreading ice spikes on the top. After, they will float down on Zero.
Ice Ring (氷の輪 Kōri no Wa) Leviathan fires rotating ice spikes in a ring pattern.
Homing Projectile (ホーミング弾 Hōmingu Dan) Leviathan will fire spearheads from her spear.
Spear (スピア) Leviathan does a downward stab with her spear. Only used in Mega Man Zero 2.
Water Circle (ウォーターサークル) Leviathan will slash Zero with her spear if Zero gets too close, launching Zero to the opposing direction as a result. Hitting the walls with this attack's launch effect won't damage Zero. Only used in Mega Man Zero 2.
EX Skill (Mega Man Zero): Spirit of the Ocean (スピリット・オブ・ジ・オーシャン) Leviathan briefly charges before unleashing an ice dragon that will track Zero until it is destroyed. Only used in Mega Man Zero.
EX Skill (Mega Man Zero 2): Tornado Spear (トルネードスピア) Leviathan will summon a tornado that will try and suck in Zero whilst sending spears flying around the room. Only used in Mega Man Zero 2.

Armed Phenomenon[]

All the Four Guardians possess a powerful alternate form called "Armed Phenomenon" which can be activated when facing more difficult enemies. When activating her Armed Phenomenon, Leviathan's body transforms into a giant blue submarine modeled after a manta ray with wide wings and a long tail. In this form, she attacks with powerful dash attacks, razor-sharp ice crystals shot from her head gem and torpedoes fired from her body. She is also able to materialize ice dragons which attack imminent targets or form a prison made of their bodies to entrap her enemies.

In the Armed Phenomenon form, Leviathan's main method of attack is trying to ram Zero. Her other attacks serve primarily to restrict your movement, and most of them can be destroyed.

Vortex Dash Vortex Dash (ヴォルテックスダッシュ) Damage: 4
Leviathan charges horizontally across the screen. The height of the attack is determined by Zero's position when the attack starts.
Ice Laser 1
Ice Laser 2
Ice Laser (アイスレーザー) Damage:

4 (laser)
2 (snowflake)
2 (shard)

Leviathan fires a beam from her head gem that causes snowflakes to fall down. When they land, they create ice shards that then float up and disappear. Both snowflakes and spikes can be destroyed.
Double Spirit of the Ocean Double Spirit of the Ocean (ダブル・スピリッツ・ジ・オーシャン, "Double Spirits the Ocean") Damage: 4
Leviathan summons two ice dragons that, if Zero is far away, will home at him. Otherwise, if Zero is close enough, they will form an "Ice Cage". Dragons can be destroyed.
Ice Cage Ice Cage (アイスケイジ) Damage: -
Dragons, released by "Double Spirit of the Ocean", form a square made from destructible ice blocks. Leviathan then immediately follows with "Vortex Dash", destroying the cage.
Ice Arrow Ice Arrow (アイスアロー) Damage: 3
Leviathan fires several ice projectiles at Zero's current position. They can ricochet once off the floor or ceiling.
Crazy Dance EX Skill: Crazy Dance (クレイジーダンス) Damage: 2
Leviathan, while using "Vortex Dash", creates a string of fish-like projectiles, that gradually descends towards the floor and eventually flies off-screen. Projectiles can be destroyed.


Mega Man Zero:
Area: Secret Base
Mission: Stop the Hacking

Mega Man Zero 2:
Area: Roof of Computer Facility
Mission: Chase Elpizo
Zero's EX Skill: Sharp Edge (Rakuretsuzan)


In-Battle Quotes[]

Action Japanese Translation Audio
Base form
Pre-battle (Mega Man Zero 2) ンフフッ… (Nfufu...) Nfufu...
Homing Projectile ヤッ!(Ya'!) Ya'!
(kiai or kakegoe)
Ice Ring ハッ!(Ha'!) Ha'!
(kiai or kakegoe)
Marine Snow (Mega Man Zero) 逃げ切れる?(Nigekireru?) Can you escape?
Marine Snow (Mega Man Zero 2) 逃がさない!(Nigasanai!) I won't let you escape!
Spirit of the Ocean 出ておいで!(Dete oide!) Come out!
Blocking with halberd 無駄よ!(Muda yo!) It's no use!
Stunned きゃあっ!(Kyaa!) Kyaa!
Armed Phenomenon
Pre-battle もっと!もっとよ!(Motto! Motto yo!) More! More, I say!
Vortex Dash ハッハァ~!(Hahha~!) Haha!
Ice Arrow まだまだ!(Mada mada!) I'm not done yet!

Other appearances[]

  • Leviathan has her own minigame in Mega Man Zero 3 in which she swims within a lake and has to attack Mechaniloid fish (a variety of the Sharkseal) with her Ice Halberd while sparing real fish.
  • Leviathan appeared in Rockman Xover as the Secret Boss of World 6. She also appeared as Battle Memory.

Mega Man X DiVE[]

Leviathan appears as an S Rank Hunter Program in Mega Man X DiVE, being added to the game the same day as Zero (Z). Her Active Skills are Water Circle and Spirit of the Ocean, based on two of her attacks from her boss battles.

Leviathan also has two variant Hunter Programs. One is Christmas Leviathan, whose Active Skills are another two of her boss attacks, Ice Javelin and Ice Ring. The other is Festive Leviathan, whose Active Skills are Splash Laser and Go Fish, which shoots Sharkseals.

Other media[]

Leviathan appears in the Rockman Zero manga. She fights against Zero after the death of Blizzack Staggroff, because she wants to avenge him, but Zero defeats her with the Flame Chip. Later, she combines with Harpuia, Fefnir, and Phantom to become "the perfect Reploid".



  • Fairy Leviathan's first name refers to her fairy-like qualities, such as her grace and femininity. Her second name is derived from the Biblical sea monster Leviathan, a term which typically refers to any large sea creature.


  • Trauare Wrede, a character from the Rosenkreuzstilette series, is a tribute to Fairy Leviathan. She has also named her spear "Leviathan."
  • In the very first battle with Leviathan, if Zero can reach the ledge on the far right, and stay on the far right side of the ledge, Leviathan will never reach Zero, allowing him to get as many free hits as desired. However, this is not possible in the rematch at Neo Arcadia.
  • The roar of Leviathan's ice dragons in the first Mega Man Zero is identical to that of the Toho kaiju, Anguirus.