The Great Mother is the matron of all winged Invaders, exclusive to Metal Slug Attack. She first made its debut on the game's event titled 'Try Line 2nd', where the boss can also become a playable unit.
The matron of the Winged Invaders. She's come to check in on her sweet children as they work towards world domination. The impressive flapping sound of her wings causes all those in the cosmos to feel an equal amount of fear.
- ~Metal Slug Attack in-game description.
In Metal Slug Attack's event, this boss is fought at the last stage. She unleashes a jolt of electricity with a red core on her forehead as her regular attacks. This piercing attack can also dish out rapid damage over time and has a long range. To add insult to the injury; this attack is also capable of stunning the player's units.
|Great Mother: The original incarnation.|
|Great Mother Animus: Returning after a great feast, the Great Mother's carapace has changed to a more dark-red hue. She's also switched her attacks around, dealing more damage at the cost of no stun capability.|
|Great Moth: A subspecies of the Great Mother, who flies around using its red core to jolt electricity in concentrated blasts.|
|Great Nest: The abdomen placed on top of a walking tentacle plant. The Invaders use this organic device whenever they terraform a plant. It produces and disperses several homing Space Mole Crickets to change the surface environment and recover energy sources. The Space Mole Crickets can stun and poison enemies.|
- In the game's files, she is referred to as "Toucyuukasou" (ノムシタケ属 in Katakana) which translates to Cordyceps, a parasitic fungus.
- The Great Nest's lower body is a palette swap of Bloom Metzelei's lower body.