The Medium Bosses are stronger enemies that can appear once or several times per mission in Azure Striker Gunvolt, Azure Striker Gunvolt 2 and Gunvolt Chronicles: Luminous Avenger iX, and usually have powerful attacks and health closer to a normal Boss than a normal enemy. Unlike bosses, however, they lack phases and dedicated boss healthbars, and are with few exceptions never used to close off a mission.

Finishing them off with a special skill will grant a 200 kudos bonus in 1, while in 2 it will grant a 500 kudos bonus. Some medium bosses also have Secret Kudos bonuses attached to them in the first game.

Azure Striker Gunvolt


Mantis ova
The Michi Mk 17 Type 3 "Mantis" (ミチ一七式丙“マンティス”) is a 9th generation unmanned tank created by the Sumeragi Futures Institute of Technology (S-FIT) to capture and/or kill adepts, being a model intended for nocturnal warfare. The easy way it can be used and its high battle potential make it the most widespread tank used by Sumeragi, despite some worries about the power core's cooling device.

It first appeared in the beginning of Azure Striker Gunvolt as a sort of tutorial boss. All Mantis robots share a common weakness; when their head takes significant damage, they temporarily shut down, exposing their main core unit.

  • This unit's weakness is apparently a common flaw for all 9th gen units.

Two appear during the initial intro stage, although two more sent to stop Gunvolt were destroyed by Asimov before they could reach the train. The first one comes with a crate for a foothold, the second does not. The second one also gets a few free shots on you, firing its laser cannon off-screen as you make your way to the arena.


Attacks Description

Homing Missiles

Fires a swarm of missiles at Gunvolt. They can be blocked by the Flashfield.
The Mantis sweeps the ground with a hail of bullets. Avoid by jumping in the air or simply staying off the ground in general.
Only the second Mantis uses this attack. A large beam is fired straight forward. Don't jump while it is firing.

Mantis Legion

The Michi Mk 17 Type S "Mantis Legion" (ミチ一七式S“マンティスレギオン”), commonly known as the "Red Mantis", is a stronger version with improved attacks and much shorter cooldown time for its core. The Sumeragi top brass, irritated at how slowly the development of 10th gen tanks was going, ordered S-FIT to develop a machine using some of the in-development Plasma Legion's tech "to meet the deadlines". The end result was the Mantis Legion. The development team did not want to make this machine, but since it cleared the Plasma Legion's desired specs at the start of development, combined with the profitability that came with a model very close to the Mantis in production and repair, it became highly evaluated within Sumeragi. Since Eunos Inc. transfer staff were involved in the development, and as a machine made through official employment, this is the first time that a Latin alphabet letter has been used in an official model designation by Sumeragi.

One serves as the boss of Urban Run, while three Mantis Legion units appear in Eridu.

  • The second Mantis Legion in Eridu gets a row of spikes in the back of the field, making dodging attacks more difficult.
  • The third gets spikes in the back AND middle portions of the field, further increasing difficulty.


Attacks Description
Legion EnergyHomingMissiles

Energy Homing Missiles

The Mantis Legion's missiles have been modified to fire energy balls when destroyed by Flashfield. These balls can't be blocked by the Flashfield.
Legion Jump


The Mantis Legion makes a jump to the other side of the screen, trying to crush Gunvolt.
Legion Vulcans

Vulcans + Laser Cannon

Legion LaserCannon

Vulcans + Laser Cannon

Sweeps the ground with bullets to force you into the air, making you easy prey for a following laser blast. To avoid, jump to position yourself inbetween where the bullets are fired onto.

Spyder Unit

Biochem Plant (2)
The Miha Mk X19 "Spyder" (ミハX一九式“スパイダー”) is a prototype 10th generation unmanned tank being developed in parallel with the Plasma Legion, but with a different approach and development team. Working prototypes of the Spyder were rolled out sooner due to delays in the former's development. It is highly efficient, but serviceability and cost performance problems have made some hesitate to call it a true 10th gen tank. QUILL had no knowledge of it prior to Gunvolt's encounter. In addition to its armaments and ability to cling to ceilings, this robot has a hard shell protecting its core unit which only opens up when it attacks.

It first appears in Biochem Plant as the mid-boss of the stage. As it was still only being tested, a lower ranked soldier protested to deploying it, but was overruled by his superior officer who insisted that blowing away Gunvolt would be a fine demonstration. It was only destroyed by Gunvolt, of course.

A second Spyder Unit also appears in Prism Highway, trapped by Ghauri's crystal, but still capable of attacking despite being immobile.


Attacks Description
Fires a blast diagonally upwards to clip the upper layer and air, causing rubble to fall.
Anti-ground pattern- Fires a blast that goes through the lower and middle layers, even a part of the upper layer. Avoiding this attack requires hovering with the Flashfield or otherwise being airborne, as the laser covers all ground that can be stood on. 
Spyder Roof Crawl

Roof Crawl

Spyder Unit jumps and grabs the roof to dash towards Gunvolt. It will drop 3 bombs onto the field as it returns to its original position.
Only used when on the ceiling. Drops bombs whose explosions can reach the lower parts of the field. Stay on the middle or upper layers to avoid it. They can't be blocked by the Flashfield.

Eidolon Flower


The Eidolon Flower (also known as ViVid) is a gigantic bio-mechanical flower that grows in the Pharma Lab. Its main purpose is the production of S.E.E.D. a drug normally used for stress relief, however, according to Moniqa, it is addictive, and is capable of enhancing their septimal powers (and in the process used to control adepts). Despite its seemingly docile nature, it is capable of protecting itself when a threat is identified. The plant's weak point is the pistil hidden within the flower, which can be opened by shooting it.


Attacks Description
Eidolon Pollen

Pollen Spores

While the petals are closed, the Eidolon Flower will drop five yellow spores which sway to and fro as they fall. They cannot be blocked by Flashfield.
Eidolon Insects

Insect Swarm

When the petals open, the flower releases a swarm of bugs that home in on your position. They can be destroyed with Flashfield.

Azure Striker Gunvolt 2

Gunvolt and Copen themselves appear as medium bosses in their respective campaigns, fighting each other in Frozen City. Details on these fights can be found on their respective pages.

Proto Legion JB

The Proto Legion JB (プロトレギオンJB) is a prototype of the 10th generation autonomous tank Plasma Legion being developed by Sumeragi. Zonda acquired its design data during her infiltration of the group, which Teseo used as a basis to recreate the tank with his Septima. Since it was built in a rush, it lacks many of its fully developed version's features, such as the detachable body, Legion Tornado, ZMC Field, and Stabilizer missiles. It is deployed by Teseo to block Gunvolt's path when he nears a control room in the Seraph airship, but is either destroyed or recalled by Teseo as it suffers critical damage.


Attacks Description
Proto plasma

Hummer D

In place of the Stabilizer drill missiles, it is equipped with the AAC warhead "Hummer D". These missiles are unleashed in a swarm when the missile pods open, but can be blocked with the Flashfield.
Plasma Ball

Plasma Ball

A large plasma ball is charged up and fired from its head in the player's direction. If it connects with the ground, it will stay there for a moment before splitting into two balls that travel along the ground. This attack is always used in a three round burst.
When it loses 1/3th of its health, Teseo's Septima will cause it to teleport midair to the other side of the room and drop to the ground.



The Fazent (also known as Phesant) (フェイザント) is a 10th generation Sumeragi autonomous fighter jet. It is stored in the Sumeragi Airship Seraph, and as noted by Copen and Nori, had trouble getting it to work due to engine problems, that is until it was activated by Asroc's Septima and was unleashed upon the city in an attempt to distract Gunvolt, only to be destroyed by Copen. Its body is split into an upper and lower half, each containing its own weaponry.

  • While the bottom half can be destroyed for more Kudos, you need to destroy the head to win.
  • GV does fight one in Milas' stage. Eden found several units inside of the Seraph aircraft and allocated one to Milas' unit.


Attacks Description
A targeting reticule flies around before stopping on a certain spot, which gets peppered with gunfire.
The Fazent flies off-screen and makes it rain missiles. Keep the Flashfield up to block them.
The Fazent's lower half drops a mine that explodes a few seconds later, sending explosions across the ground.

  • The Fazent will not use this attack if its lower half is destroyed.

Prismatic Spyder

Prismatic Spyder

The Prismatic Spyder is a Sumeragi Spyder trapped by Ghauri's "Prism" Septima. It is the mid-boss of the Highway. Like the Spyder unit from the first game, the core unit is protected by a thick shell, which only opens up when it attacks.

  • Due to the divergent yet parallel natures of the story modes in ASG2, only Copen will fight this boss in canon. GV can fight this boss as part of a Special Mission.


Attacks Description
PrismSpyder LaserReflect

Laser - Refraction Pattern

The Spyder unit fires a laser in an upwards sweeping pattern. This laser can be refracted by the prisms scattered about the field, so be careful.
PrismSpyder LaserCollapse1

Laser - Collapse Pattern

PrismSpyder LaserCollapse2
Fires a laser across the ground, then up to the ceiling. The blast on the ceiling causes rubble to crash down. Dodge the initial laser by hiding behind one of the crystal rocks, and dodge the rubble with the Flashfield.
PrismSpyder Bombs


Tosses a set of arcing bombs that make tall explosions. They cannot be blocked with Flashfield.

Luminous Avenger iX

Mantis Zombie

Mantis Fusion encounter
The Mantis Zombie (マンティスゾンビ) is a cluster of old parts from the Mantis Legion and other machines controlled by a Sumeragi Institute Adept, possibly either a field commander or an officer going by his uniform, who wields the Septima Fusion (憑依 (フュージョン).

He appears in City Slums, dropping down behind Copen as the latter passes by the remains of a Mantis Legion. The Adept uses his Septima to draw in the parts and assemble it into a broken down facsimile of the tank, turns himself into a ball of light, and merges with the wrecked machine to bring it to life.

The Mantis Zombie is mostly immobile and lacks some of the machine's armaments, such as missiles or the face laser cannon, presumably due to missing parts.

Each time the machine is disabled and its operator is forced out counts as an individual kill, so for high score chasing it is ideal to remain airborne throughout the entire fight.


Attacks Description
Mantis Zombie - Scrap Launcher

Scrap Launcher

Launches pieces of scrap around the area via through its damaged missile pods. It can be blocked with a Flashfield.
Mantis Zombie - Scrap Cannon

Scrap Cannon

Launches pieces of scrap from its mouth towards their enemy. Like the above, it can be blocked with a Flashfield.
Mantis Zombie - Laser

Laser Shot

Aims its one intact autocannon horizontally or diagonally and fire a laser shot from within.
Mantis Zombie - Fusion


If the Adept is allowed to recover from his fatigued state after being forced out of the machine, he will fuse with it again by moving in a wide U-turn to the right of the screen.
Mantis Zombie - Engage


Once the Mantis Zombie has been disabled for a third time, the Adept will be too exhausted to fuse with it again. Out of other options, he will pull out a submachine gun blaster and begin horizontally firing in six shot bursts.


Pljm16476 s05

Model Number BSM-02 Garand (型式番号BSM-02 ガランド) is a black state-of-the-art autonomous fighter jet developed by the corporation Sol Electronics and used by the Sumeragi Institute of Human Evolution. It is designed to hunt down minos and to operate in places with complicated terrain such as cities, so it's far more mobile and flexible than past fighter jets.

It is equipped with a high-output energy cannon called the Accel Blast underneath its body, rocket pods on its wings, and claws near the nose capable of firing energy shots. The Accel Blast in particular is capable of instantly reducing mino homes to scorched earth.

In spite of its mobility, it is heavily armored and resistant to many weapons, requiring the EX Weapon Photon Detonator to make short work of it.

A unit is sent to the train en route to Sumeragi Building 13 in order to prevent Copen from getting inside, but it is destroyed by him.


Attacks Description
Garand - Plasma Shot

Plasma Shot

Retracts its laser cannon and fires off balls of plasma from its claws in a spread.
Garand - Rockets


Fires off rockets in the direction of Copen's position. Can be blocked with the Flashfield.
Garand - Accel Blast

Accel Blast

Charges up a large cannon in order to fire a large laser shot on an enemy. Can only be avoided by flying above it.


Ladybug Encounter

The CB04 Ladybug (レディーバグ) is an autonomous security robot that is shaped like a ladybug. It flies around while dropping bombs at their targets, and while enclosed, becomes invulnerable until it opens up again.

It is deployed inside Data Center Beta to stop Copen from advancing through.


Attacks Description
Ladybug - Blaze Bomb

Blaze Bomb

Retracts its laser cannon and fires off balls of plasma from its claws in a spread.
Ladybug - Spinning Dark

Spinning Dark

Encloses itself and attempts to ram at their targets while spinning, either bouncing around walls or once after which they open up again. They are invulnerable while enclosed.


  • 1st Sumeragi, Urban Run, Seraph Interior and Downtown are the only stages in the series to end with a medium boss rather than a main boss. Of those, Urban Run is notable for consisting near solely of a medium boss, arguably making it the smallest level in the entire series.
  • The Fazent has a different, drab color scheme prior to being hijacked by Asroc. Upon being destroyed, its wreckage reverts to the original colors.
  • A golden variant of the Mantis, known as the Mantis Delta, was intended to appear in ASG2, but didn't make the final cut.
  • A Mantis figure can be seen on Merak's desk in artwork from Lazy Kingdom.
  • The Adept that fuses with the wrecked Mantis Legion is the second Adept medium boss in the series, with Gunvolt being the first.
  • The concept art for the Garand shows off 3 weapons (2 fired from the head) that were scrapped in favor of simply launching missiles at Copen.
    • Launching Hi-Explosive bombs on an arc.
      Mantis Zombie - Surrender
    • Launching cluster bombs that can be blocked with a Flashfield
    • Launching combat drones that assists the parent Garand by firing lasers at their targets.
  • When the Mantis Zombie is defeated, a while flag may pop out of where the tank's core once was. 
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