Races of the Milky Way
Since humankind's discovery of the transluminant travel, several species of alien have been encountered. Below are the 6 most common races that you'll find across the galaxy, but other races are possible as well.
NOTE: If I see a single Space Marine or anything resembling a Jedi they will be denied.
Humans
Humans are the original natives of the planet Earth. They come in all manner of shapes and sizes, ranging the spectrum of races normally found back on Terra Firma. They are a highly versatile race, meaning that they are able to fill almost any niche that they need to fill in. Some are naturally psionic, although their prowess for it still pales in comparison with some of the other races. At this present point in time over 70% of the human population was either born on another planet or in a space colony, most of whom have never seen Earth.
Kunari
The Kunari are one of the most advanced races in the Milky Way, second perhaps only to the Sintari. The "space elves" as they have been dubbed by humans, are a proud and ancient race descended from the simian felines that once prowled the forests of their native world of Elmarath. As their nickname implies, they are humanoid in appearance, resembling the tall and fair elves of human myth, save that they are possessing of catlike eyes and sharper canine teeth. Similar to humans, Elmarath's diverse climate caused the Kunari to splinter into several subspecies. Generally, Kunari from desert areas (or have ancestry therein) are of a ashen to dark gray color, while those of icy climates tend to be whitish-blue. Those of tropical zones often come in a rich plum hue and Kunari from temperate environments are often a pale peach-cream.
As a race, the Kunari are actively psionic; every member of the race has some degree of psychic ability, but only a fraction of the population are trained to use it for combat. The rest use it domestically, which shows in their technology, often allowing its users to interface psychically to things like phones, computers, and even ovens. This is thanks to a crystalline substance found in Elmarath's crust (and that of its moons) that reacts to psychic energy. Depending on their cut, these crystals can store and-or augment psychic energy. This makes them invaluable, especially to their military, which uses them extensively.
Myari
Native to the frigid planet of Demartia, the Myari are a race of mammalian humanoids that stand just short of 5 feet tall with large ears and tails. Most notable of the Myari is their resemblance to large predatory cats crossbred with squirrels of Earth. Their whole bodies are covered with a fine layer of fur in colors ranging from pure white to pale blue and in some rare cases shades of green, with the fur being thicker on the head, neck and tail. Each individual member of the species have unique stripes and whorls that no other member of their species share.
Myari are highly accustomed to the normally uninhabitable temperatures of Demartia, able to withstand temperatures as low as -100 degrees Centigrade (-148F). As a result: any Myari traveling off world must wear a special coolant suit to prevent them from fatally overheating. They are a highly nomadic society; constantly moving across the surface of the planet to avoid the truly frigid winters where the temperature can drop down as low as -300C (-508F). By using their sharp retractable claws, Myari are adept climbers and diggers- as such many of their permanent cities are located underground. They are fierce warriors, and as per the ancient religious edicts passed down from one tribe shaman to another they still "grow" their weapons out of the mineral rich crystals that dwell underneath the perpetually frozen surface of the planet.
Selveren
Selveren are a barbaristic race of reptilian warriors who hail from the windswept planet of Eorlafar. Their anatomy is similar to that of anoles of Earth: their bones are segmented and flexible which allows them to squeeze into tight crevices (the record thus far is 15cm (6in). Their skin is covered with a very fine layer of tiny scales that are riddled with chromatophores which allow them to nearly perfectly mimic the textures and colors of their surroundings. Similarly their hands and feet are coated with microscopic fibers that allow them to climb and stick to any surface on a near molecular level.
The overall society of the Selveren is one of tightly knit clans of warriors who live together and worship a singled deity: one who's name translates in the human tongue to "The Serpent Who's Fang Brings Forth the Venom of Life". They are glory seekers rarely living past the age of 40. Their unique physiology makes them highly adept at stealthy roles and a Selveren spy often costs nearly quadruple the amount of a spy of one of the other races.
Sintari
The Sintari are a race of cephalopods who hail from an aqueous planet known as Desch. Resembling a strange cross between a human and a squid, the Sintari have humanoid faces with large eyes, no nose and a small lipless mouth with a hard crushing beak concealed within. They sport two sets of long segmented arms from their shoulders, and a small cluster of 6-10 tentacles at the waist. On land, they are generally fairly clumsy without the aid of mechanical transportation while in the water they are graceful predators. While they do not need water to survive in the same way standard sea creatures do, they will ultimately begin to dehydrate unless properly moisturized.
As a whole, the Sintari race are obsessed with finding the "God Particle"- the hypothetical particle that sparked the creation of the universe. Their technology is second to none to any of the others in the galaxy- particularly in their advances in medical technology. Specifically: their understanding of biology has allowed them to force their own "evolution" in that they are a highly adaptable race and often have a surgical procedure up their sleeve for just about any situation. Recent advances in their research allow them to analyze and repair objects on an atomic level in a process similar to the mythical process of alchemy.
Krin
The Krin are a mysterious and relatively young race of artificial humans. Their internal structure is composed of highly dense but lightweight composite metal skeletal systems, artificially grown fully functional organs, all wrapped up in a synthetic bio-mesh skin weave that acts and functions nearly identically to real skin. Each Krin is preprogramed with a growth algorithm that "ages" the individual over the course of 16 years; starting off with the appearance of a small human child and ultimately progressing into a full sized adult. Upon their "deaths", they migrate back to their home world where they upload their memories and experiences to a central hub before wiped clean and rebuilt with different parts.
Their entire society is built on the principles of observation, functionality and enlightenment. The Krin believe that a proper response can only be made through proper observation and are naturally keen observers with a penchant for study and collection. Their actions and demeanors are usually without flourish or excess preferring that they take the most direct route possible to achieve their desired goal. Their principle of enlightenment has much to do with a sense of personal growth as well as spiritual connections; the Krin are highly fond of their origins and often spend time meditating on their own identities via their connection with others and the universe.