Xenomorph Queen (LV-426)

This specific Xenomorph Queen appeared in the film Aliens. Presumably sired from a Royal Facehugger, it came to command the hive that had been built on the planet LV-426 in 2179. After it had reached maturation, it began laying eggs on a constant basis while its Drones captured colonists from Hadley's Hope to be used as hosts.

By the time the United States Colonial Marine Corps sent a squad to investigate the Xenomorph infestation, all of the colonists had been taken apart from one little girl called Newt. Ellen Ripley and the Marines did their best to protect the girl, but most of the squad ended up being killed by the Xenomorph horde. During this time, the Queen remained concealed within the heart of the hive located inside the colony's atmospheric processing plant, although Ripley and Squad Commander Lt. Gorman had theorized the existence of the Queen, seeing as how no one had seen where Xenomorph eggs had come from.

After Newt was captured by the horde, Ripley decided to try and save her, venturing into the hive by herself. After finding and freeing the young girl, she led her through the maze-like structure of the hive only to turn into the central chamber where the Queen was laying eggs. Xenomorph Drones moved in to attack, but Ripley threatened to torch the eggs in the chamber with a flamethrower, prompting the Queen to call off her guards. As Ripley and Newt approached the exit, Ripley fired her Incinerator and set the hatchery ablaze, infuriating the Queen.

As Ripley and Newt fled, the queen detached her ovipositor and pursued the humans. The dropship Smart Ass arrived at the landing platform to carry Ripley and the other survivors back to the USS Sulaco in orbit, but the Queen also boarded the craft and hid within the landing gear compartment. When the Smart Ass landed within the Sulaco's hangar, the Queen emerged and attacked the android Bishop, tearing him in half. The Queen then advanced on Newt, who tried to hide beneath the floor grilles while Ripley went to activate a Power Loader. Ripley returned with the exoskeleton and fought against the monster, managing to throw it into an airlock. She managed to open the airlock and eject the Queen into space, which likely burned up upon re-entering LV-426's atmosphere.

Despite Ripley's apparent victory, the Queen had smuggled an Ovomorph aboard the Sulaco before being killed. While Ripley, Newt and Corporal Dwayne Hicks went into hypersleep for the voyage back to Earth, the egg was undisturbed and later hatched, releasing a Royal Facehugger. This Facehugger would impregnate Ripley with a Queen embryo before dying off.