The Medium Bosses are stronger enemies that appear once or twice per mission in Azure Striker Gunvolt and usually have powerful attacks and almost the same Health of a normal Boss.


This 9th generation tank, known as the Mantis, was created by Sumeragi to capture and/or kill adepts. It first appeared in the beginning of Azure Striker Gunvolt as a sort of tutorial Boss to teach the new players and is later used in other missions. 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. 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 Edit

Missiles - Fires a swarm of missiles at Gunvolt. They can be blocked by the Flashfield.

Machine Guns - The Mantis sweeps the ground with a hail of bullets. Avoid by hovering in the air.

Laser Cannon - Only the second Mantis uses this attack. A large beam is fired straight forward. Don't jump while it is firing.

Red MantisEdit

Red Mantis
During the final missions of the game (more specifically the mission "Streak"), GV will encounter the Red Mantis, a stronger version capable of using more missiles and attacks. A total of 3 Red Mantis units are in the mission.
  • The second one gets a row of spikes in the back of the field.
  • The third gets spikes in the back AND middle portions of the field.
    • These factors make Streak absolutely PAINFUL with the Lethal Lavaliere.

Attacks Edit

Energy Missiles - The Red Mantis' missiles have been modified to fire energy balls when destroyed by Flashfield. These balls CANNOT be blocked by Flashfield.

Jump - The Red Mantis makes a jump to the other side of the screen, trying to crush Gunvolt.

Laser+Guns - Sweeps with the machine guns to force you into the air, making you easy prey for a laser blast.

  • Note: you get a 200 Kudos bonus for defeating a Mantis with a skill.

Spyder UnitEdit

Biochem Plant (2)
The Spyder Unit is a black-yellow spider robot that only appears in Biochem Plant as the mid-boss of the stage. According to in-stage dialogue, this unit is a prototype, and was still being tested prior to GV's intrusion. There are also implications of this unit being a 10th generation unit, possibly to supersede the Mantis-types currently in production. This robot has a hard shell protecting its core unit, which only opens up when it attacks.

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


Laser Cannon - Anti-air pattern- Fires a blast diagonally upwards to clip the upper layer and air.

Laser Cannon - Anti-ground pattern- Fires a blast that goes through the lower and middle layers, even a part of the upper layer. Avoiding this attack may even require hovering with Flashfield.

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.

Carpet Bombing - 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.

Eidolon Flower Edit

The Eidolon Flower (also known as ViVid) is a gigantic bio-mechanical flower that grows in the Pharma Lab. While its main purpose is the production of the drug S.E.E.D., 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 Edit

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.

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.

Fazent Edit

The Fazent (also known as Phesant) 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 Edit

Machine gun - A targeting reticule flies around before stopping on a certain spot, which gets peppered with gunfire.

Missiles - The Fazent flies off-screen and makes it rain missiles. Keep the Flashfield up to block them.

Land mines - 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 Edit

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 Edit

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.

Laser - Collapse pattern: Fires a laser across the ceiling. It also causes rubble to drop down. The rubble can be blocked by Flashfield.

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

Wrecked Mantis Edit

The Wrecked Mantis is the remains of a Red Mantis reassembled and controlled by an Adept (presumably from Sumeragi), it attacks by launching pieces of scrap at its opponent, and utilizes its arm to fire a powerful laser shot (despite its drum magazine being equipped). Once the tank's health is depleted, the Adept then emerges to attack. As it was missing its legs when reassembled, it is unable to move. It appears in Luminous Avenger's teaser trailer.