The Invid are a slug- and insect-like race responsible for the Third Robotech War. They have a symbiotic relationship with the Flower of Life—the plant that is the source of protoculture. Historically, they are the enemy of both the Robotech Masters and, more distantly, the Haydonites. Their invasion of Earth after the Second Robotech War also pulled them into conflict with humankind.
Homeworld and empire
The Invid were from an unknown planet since destroyed by the Haydonites. More recently, they had made their home on Optera, which is relatively near the home world of the Robotech Masters.
After the loss of Zor's battle fortress, the Invid took advantage of the weakening empire of the Robotech Masters. They built their own empire from the ashes of the old. After the arrival of the Pioneer Expedition, searching for the home world of the Zentraedi and the Robotech Masters, the Invid empire began to collapse. The alliance of the Sentinels with the United Earth Expeditionary Forces led to the overall collapse of the Invid empire, including the loss of Optera.
The Invid are ruled by an all-mother calling herself the Regis, and an all-father called the Regent. The Regent led the Invid forces encountered by the Pioneer Mission, while the Regess led the invasion of Earth that led to the Third Robotech War. The Regis and Regent are considered mates, though their relationship is less than cordial. Both rulers have their own vision for the place of the Invid in the universe, and the methods that will lead them there. While the Regis is more concerned with the evolutionary preservation of the race, the Regent is more focused on their military advancement.
The Flower of Life
The alien plant known as the Flower of Life is inexorably tied to the survival of the Invid race. When the Robotech Masters discovered protoculture while studying this plant, they believed the Invid unaware of its properties. The Zentraedi, under orders from the Masters, were sent to harvest as much of the Flower as they could, then defoliate the entire planet of Optera.
The destruction of Optera's ecosystem changed the Invid.