She is here!
The Queen (Internecivus raptus queens) is a huge Xenomorph that serves as the mother and leader of a Xenomorph hive. Her appearance differs from that of a drone, with a pair of extra arms and a large head crest. Individual Alien Queens vary in size, age, and appearance.
They can engage in combat, but usually remains stationary, letting the Praetorians (or drones and warriors, if none have developed yet), do their dirty work while they direct the hive and lays the eggs. A Queen can disconnect from its egg sack by pulling its tail out as seen in the 2010 AVP video game. A Queen is much more intelligent than a normal Xenomorph, displaying traits of anger and vengeance beyond any purely instinctual behavior. An example of this is when the Queen saw her nest destroyed by Ellen Ripley, but more importantly, Ripley killed all her children, and the Queen then began a furiously murderous rampage in an attempt to kill both Ripley and Newt, even going so far as to hide herself in the landing gear of their dropship and follow them back to the USS Sulaco. Ultimately, Ripley finished the Queen off by throwing her out the air lock.