The Kree are a fictional alien race in the Marvel Comics universe. They are known for their blue skin and advanced technology, often depicted as a militaristic society. The Kree are one of the most powerful races in the galaxy and have a complex history, including conflicts with other species, such as the Skrulls. In the comics, the Kree are often involved in significant storylines, including the Kree-Skrull War. They have notable characters like Mar-Vell, a superhero who became a key figure in the Marvel Universe. The Kree's interactions with Earth and its heroes, such as the Avengers, play a crucial role in many narratives.