Kroonistuneet

Kroonistuneet, also known as the Crowned, are a fictional alien species from the science fiction franchise "Doctor Who." They first appeared in the 2007 episode "Silence in the Library" and have since become a recurring element in the series. Kroonistuneet are characterized by their distinctive appearance, featuring a crown-like structure on their heads, which is actually a living organism that feeds on the energy of their host. This crown can be removed and used as a weapon, known as a Kroon, which can be attached to other objects or beings to drain their energy.

The Kroonistuneet are known for their advanced technology and their ability to manipulate energy. They are often depicted as being in conflict with the Doctor and his companions, as they seek to harness the energy of the universe for their own purposes. Despite their malevolent intentions, the Kroonistuneet have also shown a degree of intelligence and strategic thinking, making them a formidable adversary.

In the episode "Silence in the Library," the Kroonistuneet are revealed to be the creators of the Library, a vast repository of knowledge and information. They use the Library to gain power and control over the universe, but their plans are disrupted by the Doctor and his companions. The Kroonistuneet have since appeared in several other episodes, including "The Girl in the Fireplace," "The Wedding of River Song," and "The Husbands of River Song," where they continue to pursue their goals of harnessing energy and controlling the universe.